Dog Allergy & Elimination Diet Tracker
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Understanding food allergies in dogs
What causes food allergies in dogs?
Food allergies in dogs are an immune-mediated response to specific proteins in the diet. The immune system mistakenly identifies a food protein as a threat and mounts an inflammatory response. This is different from food intolerance (which involves the digestive system, not the immune system). True food allergies develop only after repeated exposure to a protein — a dog cannot be allergic to something it has never eaten.
| Allergen | Frequency | Notes |
|---|---|---|
| Beef | 34% | Most commonly reported food allergen in dogs |
| Dairy | 17% | Includes milk, cheese, yogurt, and whey-based ingredients |
| Chicken | 15% | Very common in commercial dog foods, making it hard to avoid |
| Wheat | 13% | One of few non-protein allergens; present in many kibbles |
| Lamb | 5% | Once considered hypoallergenic, now common enough to trigger reactions |
| Soy | 4% | Found in many commercial foods as a filler protein |
| Corn | 4% | Controversial — some debate whether corn is a true allergen or intolerance |
| Egg | 4% | Both egg white and egg yolk proteins can trigger reactions |
| Pork | 2% | Less common in commercial foods, sometimes used as a novel protein |
| Fish | 2% | Generally well-tolerated; common in elimination diets |
Frequency data from Mueller, Olivry & Prelaud (2016) systematic review of 297 dogs with confirmed food allergies. BMC Veterinary Research.
The elimination diet process
An elimination diet is a two-phase diagnostic process considered the gold standard for identifying food allergies in dogs. No blood test, saliva test, or hair test has been validated as a reliable alternative — elimination diets remain the only scientifically proven method.
Phase 1: Elimination (weeks 1-8)
Feed your dog a single novel protein they have never eaten before. This could be a commercially prepared limited-ingredient diet or a home-cooked diet using one protein and one carbohydrate source. All other food sources — treats, table scraps, flavored medications, rawhides — must be eliminated. Symptoms should gradually improve over 4-8 weeks if food allergy is the cause.
Phase 2: Reintroduction (weeks 9+)
Once symptoms have resolved, reintroduce one previous protein at a time, feeding it for 5-7 days while monitoring for symptom flares. If symptoms return, that protein is a confirmed trigger — remove it and wait for symptoms to resolve again before testing the next protein. This process identifies exactly which proteins your dog reacts to.
Signs your dog may have food allergies
Food allergies in dogs commonly present as chronic, non-seasonal skin issues: persistent itching, recurrent ear infections, hot spots, paw licking or chewing, and face rubbing. Gastrointestinal signs include chronic vomiting, diarrhea, and excessive gas. Unlike environmental allergies, food allergy symptoms occur year-round and do not respond well to antihistamines. If your dog has year-round symptoms that started before age 1, food allergy should be investigated.
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Food allergy & elimination diet FAQs
1What is a food elimination diet for dogs?
A food elimination diet is a diagnostic process where you feed your dog a single novel protein (one they've never eaten before) for 8-12 weeks while removing all other food sources. If symptoms improve, you then reintroduce proteins one at a time to identify which specific foods trigger allergic reactions. This is considered the gold standard for diagnosing food allergies in dogs by veterinary dermatologists.
2How long does a dog food elimination diet take?
A proper elimination diet takes a minimum of 8 weeks for the elimination phase, though some veterinary dermatologists recommend 10-12 weeks. The reintroduction phase adds another 4-8 weeks depending on how many proteins you test. In total, expect the full process to take 3-5 months. Cutting the diet short is the most common reason for inaccurate results.
3What are the most common food allergens for dogs?
The most frequently reported food allergens in dogs are beef, dairy, chicken, wheat, lamb, soy, and egg. Beef and dairy are the most common, accounting for a significant portion of confirmed food allergies. However, any protein a dog has been exposed to can potentially become an allergen — the key factor is prior exposure, not the protein itself.
4What is a novel protein for dogs?
A novel protein is any protein source your dog has never eaten before. Common novel proteins include venison, rabbit, duck, kangaroo, and various fish species. The idea is that your dog cannot be allergic to a protein they've never been exposed to. However, many commercial dog foods contain multiple protein sources, so truly novel proteins can be harder to identify than expected. Check all previous food labels carefully.
5Can I give treats during an elimination diet?
During an elimination diet, all treats, table scraps, flavored medications (including heartworm chews), flavored toothpaste, and rawhides must be eliminated or replaced with versions made from only the novel protein being fed. Even a small amount of a trigger protein can cause a reaction and invalidate weeks of progress. Use pieces of the elimination diet food as treats, or ask your vet about hypoallergenic treat options.
6How do I know if my dog has food allergies vs environmental allergies?
Food allergies typically cause year-round, non-seasonal symptoms — especially GI issues (vomiting, diarrhea), chronic ear infections, and paw licking. Environmental allergies (atopy) tend to be seasonal and respond to antihistamines or steroids. However, about 30% of dogs with food allergies also have environmental allergies, making diagnosis more complex. A food elimination diet is the only reliable way to confirm or rule out food allergies.
7Is this tracker a substitute for veterinary care?
No. This tracker is a logging tool to help you and your veterinarian monitor your dog's elimination diet progress. Food elimination diets should always be conducted under veterinary supervision — ideally with a veterinary dermatologist. The symptom correlations this tool provides are observational patterns, not diagnoses. Always share your tracking data with your vet to guide clinical decisions.
8Where is my dog's allergy data stored?
All data is stored locally in your browser using IndexedDB. Nothing is sent to any server — your dog's health data stays completely private on your device. However, this means clearing your browser data will delete your tracking history. The data does not sync between devices.