Veterinary Diets HA Hydrolyzed Protein Vegetarian Formula Dry Dog Food
Verified Jun 8, 2026
This is a veterinary prescription dry diet for adult dogs that need a strictly controlled, hypoallergenic-type food. It uses corn starch as the single carbohydrate source and hydrolyzed soy protein as the single, vegetarian protein source, which helps reduce the chance of triggering food reactions. The formula is relatively low in fat, includes coconut oil as a source of medium-chain triglycerides, and is designed to be highly digestible for dogs with sensitive skin or digestive issues related to food allergy or intolerance.
Nutritionally, this is a well-designed therapeutic diet for adult dogs with suspected or confirmed food allergies, especially when a vegetarian, hydrolyzed option is needed. The single, hydrolyzed plant protein and single carbohydrate source greatly limit exposure to intact allergens, and the diet is complete and balanced for maintenance. It’s best used under veterinary supervision as a tool for elimination diets or long-term management of adverse food reactions, rather than as a general everyday food for healthy dogs.
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At a Glance
KibbleLab Review
Strengths
- Uses a single hydrolyzed protein source (soy) and a single carbohydrate source (corn starch), which is ideal for dogs undergoing food allergy testing or management.
- Formulated to be complete and balanced for adult maintenance, so it can be used long term when medically necessary.
- Relatively moderate protein and fat levels can be helpful for many dogs with digestive sensitivities or concurrent conditions where rich diets are not ideal.
- Backed by a major manufacturer with strong veterinary nutrition expertise and quality control, important for therapeutic diets where consistency is critical.
Considerations
- Protein level (18% as-fed) is lower than many standard adult dog foods, which is appropriate for its medical purpose but not necessary for healthy dogs without allergy concerns.
- Relies on soy as the sole protein source, which is appropriate for many allergy patients but may not suit dogs with known or suspected soy allergy.
- This food is specifically formulated for adult maintenance and is not appropriate for growing puppies or pregnant/lactating dogs.
Full Ingredient List
Ingredients and analysis reflect manufacturer data at the time of our last update and can change without notice. Always check the actual product packaging before feeding.
Ingredient filtering helps identify compatible options but is not a substitute for a veterinary elimination diet.
Top 5 Ingredients Explained
01
Corn Starch
Corn starch is a concentrated carbohydrate used in pet foods primarily as a thickener, binder and texture enhancer for kibbles, treats and canned gravies. It supplies digestible calories with minimal protein or micronutrients, so while generally safe for most dogs and cats it can contribute to excess calories and blood‑sugar increases in overweight or diabetic pets and may be a concern for animals with grain sensitivities.
02
Soy Protein Isolate
Soy protein isolate is a concentrated plant-based protein derived from defatted soy and is commonly used in dry and canned pet foods as a protein source, binder and texturizer to boost crude protein and improve kibble structure. It provides substantial protein and some essential amino acids but is generally less bioavailable than animal proteins and low in taurine (a concern for obligate carnivores like cats); some pets may be allergic to soy and soy contains phytoestrogens, though most anti-nutritional factors are reduced during processing, so consult your veterinarian for diets relying heavily on plant proteins.
03
Coconut Oil
Coconut oil is used as a concentrated fat source and palatability enhancer in dog and cat diets, providing medium-chain triglycerides (notably lauric acid) that can be rapidly metabolized for energy and may help support skin and coat condition. Because it is high in saturated fat and calories, coconut oil should be used sparingly and introduced gradually to avoid gastrointestinal upset, and pets with obesity or a history of pancreatitis should only use it under veterinary guidance.
04
Canola Oil
Canola oil is used in pet foods as a concentrated fat source and palatability enhancer that supplies energy and essential fatty acids—mainly omega‑6 (linoleic acid) and some omega‑3 (ALA)—and aids absorption of fat‑soluble vitamins. It can support skin and coat condition when balanced with animal fats or supplemental omega‑3s, but is calorie‑dense so must be portioned to avoid weight gain, does not provide species‑specific fats such as arachidonic acid for cats, and must be kept fresh to prevent oxidation.
05
TBHQ
TBHQ (tertiary butylhydroquinone) is a synthetic antioxidant used in pet foods to stabilize fats and oils and extend shelf life by preventing rancidity. It has no nutritional value; regulatory agencies permit its use at low levels in dog and cat foods, but high doses can be harmful and some pet owners prefer to avoid synthetic preservatives.
Nutritional Breakdown
How to read As Fed versus Dry Matter
As fed shows the numbers straight off the label, water included. Dry matter removes the water so you can compare a wet food and a dry food fairly.What is calorie density
How many calories the food packs per unit. Denser foods mean smaller portions for the same calories.Product Details & Brand
Product Specs
AAFCO Nutritional Adequacy
What is AAFCO
Association of American Feed Control Officials. It sets the nutritional
adequacy standards US pet foods are measured against.
What is AAFCO
Association of American Feed Control Officials. It sets the nutritional adequacy standards US pet foods are measured against.Brand
Purina Pro Plan is Nestlé Purina’s flagship veterinary- and research-backed premium line, designed for pets with specific dietary needs and active lifestyles. It is supported by extensive nutritional science and AAFCO feeding trials.
Visit Purina Pro PlanWSAVA publishes criteria for evaluating a manufacturer (qualified nutritionists, feeding trials, published research); it does not certify or endorse brands.
Manufacturer
Nestlé Purina operates its own manufacturing facilities in the United States and globally with rigorous quality assurance programs. Facilities comply with FDA and USDA standards and implement HACCP-based food safety systems. The company conducts AAFCO feeding trials and employs board-certified veterinary nutritionists.
Manufacturing details are compiled from public sources and not independently verified; they may not reflect contract manufacturing or co-packing.
Recall History
Purina Pro Plan Veterinary Diets HA Hydrolyzed Protein Vegetarian Formula Dry Dog Food has no recalls since 2014.
Source: FDA Pet Food Recall Database · Monitored daily
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Frequently Asked Questions
Has Purina Pro Plan ever been recalled?
We have no recalls on record for Purina Pro Plan. We monitor the FDA Pet Food Recall Database daily.
How does KibbleLab rate foods?
Our scores are based on ingredient composition, nutritional profile, AAFCO compliance, and health considerations. We don't penalize by-products, grains, or synthetic preservatives. Brands cannot pay for higher scores.
Is KibbleLab a substitute for veterinary advice?
No. KibbleLab provides data-driven food analysis, not medical advice. Always consult your veterinarian before making dietary changes, especially for pets with health conditions.
KibbleLab provides informational content only. This is not veterinary advice. Always consult a qualified veterinarian before changing your pet's diet.
KibbleLab may earn affiliate commissions through product links. No one can pay for a higher score, or to change what we recommend for your pet.
Product data sourced from manufacturer websites, AAFCO statements, and FDA recall database. Last verified dates reflect our most recent data check.
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