Most pet-food recalls begin with something entering the product that should not be there.
Salmonella.
Listeria.
Foreign material.
Excess vitamin D.
The 2026 Quest Cat Food case involved the opposite problem.
Something essential was missing.
In February 2026, Go Raw LLC, which operates as Steve’s Real Food, voluntarily recalled one lot of Quest Cat Food Chicken Recipe Freeze-Dried Nuggets because it might contain low levels of thiamine—vitamin B1.
The recall soon expanded to two frozen-food lots.
Then the situation became more serious.
On March 13, the U.S. Food and Drug Administration issued its own public advisory after testing eight Quest Cat Food lots. According to the agency, every tested lot contained extremely low or no detectable thiamine, even though the products were labelled as complete diets intended to meet all of a cat’s nutritional needs.
That distinction matters.
A contaminant may cause harm after one exposure.
A nutritionally incomplete food creates risk through repetition.
The product can look normal, smell normal and be eaten enthusiastically while the animal gradually loses access to a vitamin required for energy metabolism and neurological function.
Cats are particularly vulnerable because their thiamine requirement is approximately three times higher than that of dogs when compared on an energy basis. They also store very little of the water-soluble vitamin, so they depend on a reliable dietary supply.
The Quest recall was therefore more than a manufacturing problem.
It exposed how a single invisible formulation failure can turn a food labelled “complete and balanced” into a serious feline health risk.
This is one signal from the Consensys Innovation Signals Engine, which continuously scans a library of more than one million products worldwide for emerging shifts in formulation, positioning and consumer demand.
The recall began with one freeze-dried chicken lot
On February 17, 2026, Go Raw LLC recalled a single lot of Quest Cat Food Chicken Recipe Freeze-Dried Nuggets.
The affected product was:
- • Product: Quest Cat Food Chicken Recipe Freeze-Dried Nuggets
- • Pack size: 10 ounces
- • Lot code: C25288
- • Best-by date: October 15, 2027
- • Manufacturer: Go Raw LLC
- • Associated company name: Steve’s Real Food
The company said the product could contain low levels of thiamine and reported one confirmed illness at that stage. The affected cat received veterinary treatment and recovered.
Nine days later, the company expanded the recall to two lots of Quest Cat Food Chicken Recipe Frozen Diet and stopped sales of all Quest products while it addressed the thiamine issue.
The FDA found a larger problem than the company had recalled
The FDA began investigating after receiving a report from a veterinary neurologist concerning a cat with severe signs consistent with thiamine deficiency.
Additional reports of illness followed.
The agency then tested several frozen and freeze-dried Quest products.
All eight lots tested by the FDA contained extremely low or no thiamine.
At the time of the March advisory, the FDA said it had recommended that Go Raw recall all eight affected lots, but that only three had been included in the company’s public recall. The agency issued its own warning because it had not received sufficient evidence that the remaining products had been removed from sale or that customers had been adequately notified.
The issue was therefore not limited to one isolated bag.
It affected multiple lots and formats.
The food claimed to be complete despite lacking an essential vitamin
The affected products carried nutritional-adequacy statements indicating that they were formulated to meet established nutrient profiles for cats.
That label tells the owner that the food can be fed as the cat’s sole diet.
It does not merely describe the product as:
- • A treat
- • A topper
- • An occasional snack
- • A supplemental food
The FDA specifically warned consumers that the affected products were labelled as complete diets even though testing showed extremely low or absent thiamine.
This greatly increased the potential risk.
A nutritionally incomplete treat may represent a small part of total intake.
A deficient complete diet may be consumed at every meal.
Thiamine is essential to the brain’s energy system
Thiamine helps the body convert nutrients into usable energy.
After absorption, it is converted into biologically active forms that support enzymes involved in:
- • Carbohydrate metabolism
- • The citric-acid cycle
- • Energy production
- • Normal nerve-cell function
- • Neurotransmitter activity
The brain is especially sensitive because it has a high and continuous demand for energy.
When thiamine becomes inadequate, cells cannot process energy normally. Neurological tissue can then become dysfunctional, producing changes in coordination, posture, behaviour and vision.
Cats are more vulnerable than dogs—but not because only cats need thiamine
The original database row says cats are uniquely endangered because they cannot make enough thiamine themselves.
That requires correction.
Dogs also require dietary thiamine and can develop deficiency.
The more accurate feline-specific distinction is that cats have a substantially higher dietary requirement.
A major veterinary review concluded that cats are more susceptible than dogs because their requirement is approximately three times higher. Published nutrient recommendations have placed adult feline needs around 1.4 milligrams per 1,000 kilocalories, compared with approximately 0.56 milligrams for adult dogs.
The biological reason for the full difference is not completely understood, but it leaves cat-food formulations with less tolerance for under-fortification or processing loss.
Cats cannot draw on large body reserves
Thiamine is water-soluble and is not stored in large quantities.
Cats therefore require a consistent dietary supply.
If a food contains very little vitamin B1 and is fed as the sole diet, deficiency can emerge rapidly.
The FDA said some affected cats might show signs within approximately one week, while others could take months to become visibly symptomatic.
This variation makes the hazard difficult for owners to recognise.
One cat may become sick quickly.
Another may appear normal while consuming the same deficient product for much longer.
The first signs can look like an ordinary stomach problem
Early thiamine deficiency does not necessarily begin with dramatic neurological collapse.
Initial signs can include:
- • Reduced appetite
- • Vomiting
- • Excessive salivation
- • Weight loss
- • Failure to grow normally
- • Lethargy
These symptoms are nonspecific.
They can resemble:
- • Dietary upset
- • Hairballs
- • Stress
- • Infection
- • Food intolerance
- • Another gastrointestinal problem
As deficiency advances, neurological signs can develop, including:
- • Weakness
- • Wobbly movement
- • Falling
- • Circling
- • Vision changes
- • Seizures
- • Mental dullness
- • Abnormal downward bending of the neck
The characteristic neck posture is called cervical ventroflexion.
The neurological pattern can be mistaken for other diseases
A cat with poor balance, weakness or seizures may initially be investigated for:
- • Toxin exposure
- • Brain disease
- • Inner-ear disease
- • Trauma
- • Infection
- • Liver disease
- • Metabolic illness
Diet history becomes crucial.
Veterinarians need to know:
- • The exact brand and recipe
- • Whether it is the only food being fed
- • How long the cat has eaten it
- • Whether the food is raw, frozen, canned or freeze-dried
- • Whether other pets eating the same food are affected
- • Whether the diet contains raw fish or sulfites
Thiamine deficiency can resemble other neurological disorders, but prompt treatment may reverse many signs before permanent damage occurs.
Prompt treatment can be effective
Both the company recall and FDA advisory emphasised that thiamine deficiency is often reversible when recognised and treated early.
Veterinary management may include:
- • Immediate removal of the deficient diet
- • Thiamine supplementation
- • Supportive care
- • Fluid therapy where appropriate
- • Management of seizures or severe neurological signs
- • Transition to a verified complete diet
Treatment decisions should be made by a veterinarian, particularly when neurological symptoms are present.
Delayed intervention can lead to severe illness or death.
Freeze-dried and raw-style diets are not automatically nutritionally complete
Quest’s products belong to the premium raw and minimally processed pet-food market.
Such products may be positioned around:
- • High meat content
- • Limited ingredients
- • Minimal processing
- • Natural nutrition
- • Ancestral feeding
- • Whole-food ingredients
None of those claims guarantees complete micronutrient adequacy.
A meat-rich recipe can still be deficient in a vitamin required in very small quantities.
This is one of the most important lessons from the recall.
Consumers can visually recognise meat.
They cannot visually recognise thiamine.
Chicken itself cannot be assumed to supply enough
Thiamine occurs naturally in animal tissues and other foods.
But the amount in a final recipe may vary according to:
- • Ingredient selection
- • Storage
- • Freezing
- • Processing
- • Water content
- • Oxidation
- • Formulation ratios
- • Whether a vitamin premix is added
- • Whether the vitamin remains stable through shelf life
A product called Chicken Recipe may contain substantial chicken while still failing to meet the complete dietary requirement for vitamin B1.
The complete recipe must be tested—not inferred from the presence of meat.
Thiamine is unusually vulnerable during manufacturing
Vitamin B1 can be degraded by:
- • Heat
- • Alkaline conditions
- • Some preservatives
- • Extended storage
- • Oxidation
- • Thiaminase enzymes
- • Certain processing conditions
AAFCO materials warn that processing may destroy a substantial proportion of the vitamin and that manufacturers must formulate with enough allowance to ensure the required concentration remains after production.
Research on commercial pet foods has similarly identified manufacturing and storage as important sources of thiamine loss.
The formulation must account for what survives—not only what is added at the beginning.
Several different mechanisms can create deficiency
A cat food may become thiamine-deficient because of:
Insufficient formulation
Too little vitamin B1 is included in the original recipe.
Premix error
The wrong vitamin premix is used, or the premix is not added correctly.
Processing destruction
Heat or other manufacturing conditions reduce the vitamin concentration.
Storage degradation
The food meets specification initially but falls below it before the end of shelf life.
Chemical antagonists
Sulfites can destroy thiamine.
Thiaminase-containing ingredients
Raw freshwater fish and some shellfish contain enzymes that degrade vitamin B1.
The Quest case was not the first thiamine-related cat-food problem
The original research brief asks whether this is a recurring industry risk.
It is.
Previous documented cases include:
Iams canned cat food — 2010
The Iams Company recalled multiple canned cat and kitten foods after quality testing identified inadequate vitamin B1.
9Lives, EverPet and Special Kitty canned foods — 2017
The J.M. Smucker Company recalled specific canned cat-food lots because of low thiamine levels. The recall expanded to additional production codes.
Primal Pet Foods — 2021 manufacturing issue documented in 2023
An FDA warning letter said a lot of Feline Chicken & Salmon Formula Freeze-Dried food had tested below the AAFCO minimum. The agency also criticised the company’s thiamine-control procedures.
Australian pet-meat outbreaks
Cats and dogs have developed deficiency after eating pet meat containing undeclared sulfites, which destroy thiamine.
Commercial dry-food outbreak
A published outbreak investigation linked neurological illness in cats to defective dry food and highlighted losses that can occur during extrusion and storage.
No authoritative database was found that provides one complete historical total of every thiamine-related cat-food recall.
The evidence is sufficient to establish recurrence, but not to state a definitive number.
FDA already treats inadequate thiamine as a foreseeable manufacturing hazard
In a 2019 warning letter to a pet-food manufacturer, the FDA stated that inadequate thiamine in thermally processed cat food was a known or reasonably foreseeable hazard.
The agency criticised the company for failing to include that risk adequately in its hazard analysis.
That wording is important.
By 2026, thiamine deficiency could not be treated as an unpredictable scientific surprise.
The industry already knew that:
- • Cats require high dietary levels
- • Processing can destroy the vitamin
- • Deficient diets have caused illness
- • Finished-product verification is necessary
The challenge is not identifying the risk.
It is controlling it consistently.
The FDA minimum is measurable
AAFCO’s feline nutrient profile specifies a minimum thiamine concentration of approximately 5.6 milligrams per kilogram of food on a dry-matter basis.
The FDA cited that minimum when criticising Primal Pet Foods after one feline formula tested at 3.96 milligrams per kilogram.
A manufacturer making a complete feline diet therefore needs systems that verify:
- • Correct formulation
- • Correct premix addition
- • Uniform mixing
- • Survival through processing
- • Adequacy at release
- • Adequacy through shelf life
A label calculation alone may not be sufficient.
“Formulated to meet” is different from feeding-trial proof
Pet foods can support nutritional-adequacy claims through different pathways.
A product may be:
- • Formulated to meet an established nutrient profile
- • Supported by a feeding protocol
- • Intended only for intermittent or supplemental feeding
When a product says it is formulated to meet a nutrient profile, the statement often depends on recipe formulation and nutrient analysis rather than a long-term feeding trial for every batch.
A formulation can be correct on paper but fail during actual production.
The Quest case demonstrates why finished-product testing matters.
Testing only the premix is not enough
A manufacturer may verify that the vitamin supplier provided the correct ingredient.
That does not prove the finished food contains the required amount.
Errors can occur through:
- • Incorrect weighing
- • Incomplete mixing
- • Loss during processing
- • Uneven distribution
- • Ingredient substitution
- • Degradation after production
- • Laboratory or sampling problems
The most reliable quality system would test finished batches against a specification that includes a safety margin above the minimum.
Shelf life should include nutrient life
Pet-food shelf-life testing often focuses on:
- • Microbial safety
- • Rancidity
- • Texture
- • Packaging integrity
- • Palatability
A complete diet must also remain nutritionally complete until its stated best-by date.
A food that meets the thiamine minimum on the day it is made but falls below it during storage has not maintained its nutritional promise.
The correct specification is not simply:
How much vitamin did we add?
It is:
How much remains when the consumer feeds the final serving?
Premium processing narratives can distract from basic nutritional controls
Freeze drying is a technically impressive process.
It can create products that are:
- • Lightweight
- • Shelf stable
- • High in recognisable meat
- • Convenient to store
- • Different from conventional kibble
But process novelty cannot replace basic formulation discipline.
A food can contain premium ingredients and still fail because of one missing micronutrient.
The Quest case is editorially powerful because the defect was not exotic.
It was vitamin B1.
The June expansion showed the issue crossed product lines
In June 2026, Go Raw expanded the recall again to include one lot of Steve’s Real Food Freeze-Dried Chicken Recipe after low thiamine levels were identified.
The additional product was sold for dogs and cats, showing that the problem was not confined entirely to the Quest-branded feline line.
Dogs can also become thiamine-deficient.
The consequences remain especially concerning for cats because of their higher requirement.
The product’s “complete diet” role made the incident more serious than a treat recall
Many freeze-dried products are marketed as:
- • Treats
- • Toppers
- • Mixers
- • Complete diets
Those classifications are not interchangeable.
A deficient topper may be diluted by the rest of the diet.
A deficient complete food becomes the entire nutritional system.
Consumers must therefore read the nutritional-adequacy statement rather than assuming every product in the same format serves the same purpose.
The strongest warning is behavioural, not technical
Cat owners do not need to understand enzyme chemistry to recognise a potential emergency.
They need to respond when a cat eating an affected food develops:
- • Sudden appetite loss
- • Repeated vomiting
- • Excess salivation
- • Weakness
- • Difficulty walking
- • Falling
- • Circling
- • Unusual neck posture
- • Seizures
Owners should contact a veterinarian rather than attempting to diagnose or treat neurological signs themselves.
The recall challenges the belief that contamination is the only food-safety threat
Pet-food safety is often imagined as keeping dangerous things out.
That includes:
- • Pathogens
- • Toxins
- • Metal
- • Plastic
- • Excess nutrients
Complete nutrition adds another obligation:
Keeping every essential nutrient in.
A complete-diet failure can result from absence just as easily as contamination.
The most valuable industry response would be radical nutrient transparency
Pet-food companies rarely publish lot-level micronutrient data.
Consumers generally see:
- • Ingredient list
- • Guaranteed analysis for major nutrients
- • Calorie content
- • Nutritional-adequacy statement
- • Feeding directions
They usually do not see measured batch results for thiamine.
A stronger transparency model could include:
- • Lot-specific certificates of analysis
- • Key micronutrient results
- • Processing-loss allowances
- • Stability data
- • Independent laboratory confirmation
- • Clear explanation of complete-versus-supplemental status
That would move trust beyond packaging language.
This was a feline-specific emergency—but not a feline-only biological need
The original story is strongest when it remains precise.
Thiamine is not a vitamin that only cats need.
Dogs and other animals also depend on dietary vitamin B1.
What makes cats unusually vulnerable is the combination of:
- • A substantially higher requirement than dogs
- • Limited body storage
- • Dependence on daily food
- • Severe neurological consequences
- • Complete diets often fed exclusively
- • Difficulty recognising early nonspecific signs
The recall exposed the weakness hidden inside “complete and balanced”
The phrase complete and balanced is one of the most important claims on a pet-food package.
It tells the owner:
You can trust this product to be the animal’s whole diet.
The Quest case demonstrates how much responsibility is contained in those words.
A food can look premium.
It can contain recognisable chicken.
It can be freeze-dried.
It can make strong natural-nutrition claims.
But if it contains extremely low or no thiamine, it is not nutritionally complete for a cat.
For Quest Cat Food, the most serious defect may be the one nobody can see.
Brand Radar Signal Tags
Brands and Organisations
Quest Cat Food Go Raw LLC Steve’s Real Food U.S. Food and Drug Administration FDA Center for Veterinary Medicine AAFCO Primal Pet Foods Iams 9Lives J.M. Smucker Company
Products
Quest Cat Food Chicken Recipe Freeze-Dried Nuggets Quest Cat Food Chicken Recipe Frozen Diet Steve’s Real Food Freeze-Dried Chicken Recipe Primal Feline Chicken & Salmon Formula Freeze-Dried 9Lives Protein Plus Wet Cat Food Iams ProActive Health Canned Cat Food
Nutrients and Biology
Thiamine Vitamin B1 Energy Metabolism Neurological Function Citric-Acid Cycle Limited Body Storage High Feline Dietary Requirement Cervical Ventroflexion
Innovation and Failure Types
Nutritional Omission Complete-Diet Formulation Failure Micronutrient-Control Failure Batch-Level Nutrient Verification Nutrient-Retention Shelf-Life Testing Verifiable Nutritional Adequacy Advanced Format, Fundamental Failure
Clinical Signals
Decreased Appetite Vomiting Excessive Salivation Weight Loss Weakness Wobbly Gait Circling Falling Vision Changes Seizures Neck Ventroflexion
Manufacturing Risks
Insufficient Premix Processing Loss Heat Degradation Storage Degradation Uneven Mixing Thiaminase Sulfites Finished-Product Testing Failure Formulation Margin Failure
Market Signals
Raw and Freeze-Dried Pet-Food Growth Premium Ingredient Halo Naturalness Versus Completeness Nutritional Safety as Food Safety Recurring Cat-Food Micronutrient Recalls Complete-and-Balanced Trust Risk
Evidence Signals
Eight FDA-Tested Lots Extremely Low or No Thiamine Multiple Consumer Complaints Veterinary Neurologist Report Company Recall Expansion FDA Public Advisory Established Foreseeable Hazard Historical Recall Pattern
Risk Signals
Potentially Fatal Deficiency Early Signs Are Nonspecific Variable Symptom Timing Complete Diet Fed Exclusively Paper Formulation Versus Finished Product Nutrient Levels Not Visible to Consumers No Authoritative Historical Recall Total
Sources
FDA advisory and 2026 recall
- • FDA advisory — Certain lots of Quest Cat Food pose serious health risks: Reports that all eight tested lots contained extremely low or no thiamine, describes consumer complaints and lists clinical signs. https://www.fda.gov/animal-veterinary/outbreaks-and-advisories/fda-advisory-certain-lots-quest-cat-food-pose-serious-health-risks-due-extremely-low-levels-thiamine
- • Go Raw initial recall — February 17, 2026: Covers the first recalled lot of Quest Chicken Recipe Freeze-Dried Nuggets and the first confirmed illness report. https://www.fda.gov/safety/recalls-market-withdrawals-safety-alerts/go-raw-llc-issues-voluntary-recall-single-lot-quest-cat-food-chicken-recipe-freeze-dried-nuggets-due
- • Go Raw expanded recall — February 26, 2026: Adds two frozen Quest Chicken Recipe lots and states that sales of all Quest products were being stopped. https://www.fda.gov/safety/recalls-market-withdrawals-safety-alerts/go-raw-llc-expands-voluntary-recall-quest-diet-cat-food-products-due-low-thiamine-levels-and-enacts
- • Go Raw expansion — June 8, 2026: Adds one lot of Steve’s Real Food Freeze-Dried Chicken Recipe because of low thiamine. https://www.fda.gov/safety/recalls-market-withdrawals-safety-alerts/go-raw-llc-expands-voluntary-recall-include-one-lot-steves-real-food-freeze-dried-chicken-recipe-due
- • FDA recall index: Lists the February 2026 Quest recalls and affected products.
Feline nutrition and clinical evidence
- • Journal of the American Veterinary Medical Association — Thiamine deficiency in dogs and cats: Reports that cats are more susceptible because their requirement is approximately three times higher than that of dogs.
- • Veterinary Sciences — The Role of Thiamine and Effects of Deficiency in Dogs and Cats: Reviews metabolism, clinical signs, dietary causes and pet-food recall history.
- • Merck Veterinary Manual: Describes dietary thiamine requirements, antagonists and the role of complete commercial diets.
- • Published feline outbreak investigation: Documents neurological disease associated with defective cat food and discusses processing-related thiamine loss.
Historical recurrence and manufacturing controls
- • FDA warning letter to Sunshine Mills: Identifies inadequate thiamine in thermally processed cat food as a known or reasonably foreseeable hazard.
- • FDA warning letter to Primal Pet Foods: Documents a freeze-dried feline product testing below the AAFCO thiamine minimum and criticises the company’s control procedures.
- • J.M. Smucker recall: Covers low-thiamine recalls involving 9Lives and other canned cat foods.
- • AAFCO nutrient-profile materials: Warn that processing can destroy substantial thiamine and that formulation should account for post-processing losses.
- • FDA veterinary laboratory material: Notes historical thiamine-deficiency cases associated with sulfite-containing pet meat.