If your cat suffers from food allergies, skin irritation or digestive issues, you’ve probably spent time researching specialised diets. One option your vet might recommend is hydrolysed protein cat food – a veterinary diet specifically designed to reduce allergic reactions and support sensitive stomachs.
But what exactly is hydrolysed cat food, how does it work, and is it the right choice for your cat? In this blog, we’ll break down everything you need to know, from how hydrolysed proteins are made, to the health conditions they support and tips on making the switch safely.
What Is Hydrolysed Protein?
Hydrolysed protein is a type of protein that has been broken down into smaller fragments through a process called hydrolysis.
- Normal proteins are made up of long chains of amino acids.
- Hydrolysed proteins are broken into tiny peptides and amino acids, which are so small that your cat’s immune system often doesn’t recognise them as allergens.
Why Do Cats Need Hydrolysed Protein Diets?
Food allergies in cats are more common than many owners realise. They can develop at any age and often cause ongoing problems if left untreated. The most frequent triggers are proteins, particularly from beef, chicken, dairy or fish.
Signs of food allergies in cats include:
- Persistent itching, scratching or overgrooming
- Red or inflamed skin, especially around the face and ears
- Hair loss or scabs from excessive grooming
- Recurrent ear infections
- Vomiting or diarrhoea
- Flatulence or soft stools
Because protein is usually the culprit, the most effective approach is often a novel protein, limited ingredient diet, such as using less common protein sources that a cat has not been exposed to before. This way you can reduce the risk of an allergic reaction while still providing all the essential nutrition cats needs for muscle health, immune support and energy.
How Does Hydrolysed Protein Work?
Essentially, your cat’s immune system wrongly identifies certain proteins as harmful and launches an allergic reaction, leading to skin irritation or digestive upset.
When proteins are hydrolysed:
- They’re broken down into much smaller particles.
- The immune system doesn’t “see” them as allergens.
- Cats get the benefits of protein without the allergic flare-up.
This makes hydrolysed cat food one of the most effective tools for managing food allergies – especially when paired with veterinary guidance.
Health Conditions Supported by Hydrolysed Protein Cat Food
Hydrolysed diets aren’t just for allergies – they’re also recommended for other health conditions. Some of the most common include:
- Food Allergies & Intolerances
- Reduces skin irritation, itching, and digestive upset caused by common allergens.
- Chronic Gastrointestinal Issues
- Helps cats with sensitive stomachs, chronic diarrhoea or inflammatory bowel disease (IBD).
- Pancreatitis
- Easier-to-digest proteins help reduce strain on the pancreas.
- Dermatological Conditions
- Supports cats with allergic dermatitis, skin inflammation, or recurrent ear problems.
- Elimination Diets
- Hydrolysed food is often used during food trials, where your vet tests which diet relieves symptoms best.
The Benefits of Hydrolysed Protein Cat Food
Switching your cat to a hydrolysed diet can feel daunting at first, but many owners see dramatic improvements.
Key benefits include:
- Relief from itching and skin irritation
- Improved digestion and firmer stools
- Reduced vomiting and diarrhoea
- Easier long-term allergy management
Things to Consider Before Switching
While hydrolysed cat food is highly effective, there are a few things to keep in mind:
- Veterinary Guidance Is Essential – Hydrolysed protein diets are considered veterinary diets and should be recommended by a vet. They’ll ensure it’s appropriate for your cat’s symptoms.
- Strict Exclusivity – For hydrolysed diets to work, your cat must not eat anything else that contains allergens – no treats, table scraps or other food. Even small amounts of allergenic protein can trigger symptoms.
- Patience Is Key – Improvements may take several weeks. A typical food trial lasts 6-8 weeks before results are clear.
- Cost – Hydrolysed diets are often more expensive than standard cat food, but the long-term benefits to your cat’s health (and fewer vet bills!) make it worthwhile.
How to Transition Your Cat Safely
Cats are notoriously picky eaters, so switching food can take some planning. Here are some tips to make the transition smoother:
- Go Slowly – Gradually mix increasing amounts of the hydrolysed food with your cat’s old food over 7-10 days.
- Stay Consistent – Once fully switched, don’t feed other foods or treats unless your vet confirms they’re safe.
- Watch for Changes – Monitor your cat’s coat, digestion and behaviour closely. Keep a food diary to share with your vet.
- Hydration Matters – If your cat is on a dry hydrolysed diet, make sure fresh water is always available. Some formulas also come in wet food for added hydration.
- Positive Reinforcement – Encourage eating by warming wet food slightly or adding water to dry kibble to enhance aroma.
Choosing the Right Hydrolysed Protein Cat Food
Not all hydrolysed diets are the same. Look for veterinary-approved formulas that are:
- Complete & Balanced – Providing all essential nutrients.
- Tailored to Cats – Dogs also eat hydrolysed food, but cat formulas are designed for feline needs.
- High Quality – Made with controlled, consistent hydrolysis for effective allergen reduction.
At Calibra, you’ll find our hydrolysed protein cat foods have been carefully developed by veterinary experts to support cats with allergies and sensitivities.
Frequently Asked Questions
How long should my cat stay on hydrolysed food?
Many cats with allergies remain on hydrolysed protein diets for life, though some may eventually transition to other specialised foods if your vet advises.
Can I give my cat treats on a hydrolysed diet?
Only give them cat treats that are specifically designed to match their hydrolysed food, otherwise you risk undoing the benefits.
What if my cat won’t eat their hydrolysed protein cat food?
If your cat is refusing to eat hydrolysed protein food, consider gently warming the wet food to enhance its aroma, which may encourage your cat to eat. Or consult your vet about trying a novel protein, limited ingredient diet.
Final Thoughts
Hydrolysed protein cat food can make a huge difference to cats struggling with food allergies, skin irritation or digestive problems. By breaking proteins into smaller pieces, these diets reduce allergic reactions while still providing the essential nutrition cats need to thrive.
If your cat has been diagnosed with a food allergy or you suspect one, speak to your vet about whether a hydrolysed diet could be the solution. With patience, consistency and the right food, you can help your cat enjoy a healthier, happier life – free from the discomfort of food-related reactions. For trusted hydrolysed protein diets, browse our range today, or contact us for more information.
