Quick Answer: Hypoallergenic dog food uses novel proteins (venison, duck, salmon, insect) or hydrolysed proteins that are less likely to trigger immune responses. It is designed for dogs with confirmed food allergies or chronic skin and digestive conditions. True hypoallergenic diets use a single protein source the dog has never eaten. Diagnosis requires a veterinary elimination diet — not a blood test.
At a Glance
- Most common allergens: Beef, dairy, chicken, wheat, egg, soy (in order)
- Signs of food allergy: Chronic itching, ear infections, hot spots, paw licking, vomiting, diarrhoea
- Diagnosis: Veterinary elimination diet (8-12 weeks) — blood tests are unreliable
- Two approaches: Novel protein (new meat source) or hydrolysed protein (broken-down molecules)
- Key rule: Must be the ONLY food during elimination trial — no treats, no table scraps
Affiliate Disclosure: As an Amazon Associate, PetHub Online earns from qualifying purchases.
Food Allergy vs Food Intolerance
Food allergy involves the immune system. The body mistakenly identifies a food protein as a threat and triggers an immune response. Symptoms include chronic itching (especially ears, paws, and face), recurrent ear infections, skin lesions, and in some cases digestive issues. Food allergies account for approximately 10-15% of all allergic skin disease in dogs.
Food intolerance does not involve the immune system. It is a digestive reaction — the body cannot properly process a specific ingredient. Symptoms are primarily digestive: vomiting, diarrhoea, flatulence, and bloating. Food intolerances are more common than true allergies.
The distinction matters because true allergies require strict avoidance of the trigger protein, while intolerances may be managed by simply reducing the problematic ingredient or improving food quality.
Hypoallergenic Dog Food UK Comparison
| Brand | Protein Source | Type | Best For | Price | Link |
|---|---|---|---|---|---|
| James Wellbeloved | Turkey / Duck / Fish | Novel protein | General hypoallergenic | £25-45 | View |
| Royal Canin Hypoallergenic | Hydrolysed soy | Hydrolysed | Vet-prescribed elimination | £35-60 | View |
| Hills z/d | Hydrolysed chicken | Hydrolysed | Strict elimination diets | £40-65 | View |
| Forthglade | Duck / Lamb | Novel protein | Grain-free hypoallergenic | £28-45 | View |
| Lily’s Kitchen | Various single proteins | Limited ingredient | Natural hypoallergenic | £30-50 | View |
As an Amazon Associate, PetHub Online earns from qualifying purchases.
How to Run an Elimination Diet
- Choose a novel protein your dog has never eaten (venison, duck, rabbit, insect, or a hydrolysed formula)
- Feed ONLY this food for 8-12 weeks — no treats, no chews, no table scraps, no flavoured medications
- Monitor symptoms carefully. Improvement typically begins at 4-6 weeks and is clearest by 8-12 weeks
- If symptoms improve, reintroduce old ingredients one at a time (every 2 weeks) to identify the specific trigger
- Work with your vet throughout — they can monitor progress and adjust the plan
Critical rule: Everyone in the household must be committed. One slip — a dropped piece of toast, a treat from a neighbour, a stolen chip — can restart the entire trial.
Breeds Predisposed to Food Allergies
While any breed can develop food allergies, research shows higher prevalence in: Labrador Retrievers, West Highland White Terriers, Cocker Spaniels, German Shepherds, Golden Retrievers, Boxers, Bulldogs (English and French), and Staffordshire Bull Terriers. If your dog belongs to one of these breeds and shows chronic skin or digestive symptoms, food allergy should be investigated.
Frequently Asked Questions
Are food allergy blood tests accurate for dogs?
No. Blood tests (IgE and IgG) for food allergies in dogs are unreliable and not recommended by veterinary dermatologists. The only accurate diagnostic method is a controlled elimination diet lasting 8-12 weeks. Save your money on blood tests and invest in proper veterinary guidance.
What is the difference between novel protein and hydrolysed protein food?
Novel protein food uses a meat source the dog has never eaten (duck, venison, kangaroo, insect). Hydrolysed protein food breaks protein molecules into fragments too small to trigger an immune response. Hydrolysed diets are more reliable for severe allergies but less palatable and more expensive.
Can my dog grow out of a food allergy?
Unlike some childhood allergies in humans, food allergies in dogs are typically lifelong. The trigger protein must be permanently avoided. However, food intolerances (which are more common) can sometimes improve with gut healing and may be reintroduced in small amounts later.
Key Terms
Sources
- BSAVA — Food-Responsive Dermatosis in Dogs
- International Committee on Allergic Diseases of Animals (ICADA)
- FEDIAF Nutritional Guidelines (2024)
Explore more: Best Dog Food UK | Grain-Free Dog Food | Dog Health Care | Dog Supplies
