Pro Plan Veterinary Diets HA Hydrolyzed is a dry dog food for dogs with confirmed food allergies or severe sensitivities. The hydrolysed soy protein is broken into fragments too small to trigger immune responses, suitable for both diagnostic elimination diets and long-term feeding.

The single hydrolysed protein source eliminates exposure to whole proteins that commonly cause food allergies (beef, chicken, lamb, fish). A single starch source — purified rice — keeps carbohydrate exposure simple, and added omega-3 fatty acids support the skin barrier in dogs with allergy-driven dermatitis. Designed for strict elimination trials and ongoing feeding once food allergy is confirmed.

Vets use HA Hydrolyzed for the gold-standard food allergy diagnostic — feed nothing else for 8-12 weeks, then watch symptoms resolve. Owners often continue long-term: ear infections clear, paw chewing stops, the coat improves.