Helps reduce skin and GI reactions that may be a result of sensitivities to common proteins found in pet foods

Helps minimize risk of reaction with proteins that are broken down to a size that’s less likely to be recognized by the immune system

Reinforces the skin barrier with essential nutrients to support healthy skin in cats with skin sensitivity and irritation

Helps support healthy digestion with an exclusive blend of fibers and prebiotics

Whether a veterinarian has determined through an elimination diet trial that your cat has food sensitivities or that she requires long-term support for her skin and GI issues, your vet recommended Royal Canin Hydrolyzed Protein Adult HP for a reason. This highly palatable diet is designed for adult cats. It’s formulated with hydrolyzed soy proteins, composed of low molecular weight peptides, so they can be absorbed in the digestive tract with a reduced risk of triggering an immune reaction. Optimal amounts of B vitamins and amino acids reinforce your cat’s skin barrier. Omega-3 fatty acids EPA and DHA help promote healthy skin and coat. An exclusive blend of fibers helps support healthy digestion in cats prone to digestive upsets, including diarrhea. And with strict manufacturing procedures to help avoid cross contamination, you can confidently feed Royal Canin Hydrolyzed Protein Adult HP long-term to cats with food sensitivities.

Brewers rice, hydrolyzed soy protein, chicken fat, powdered cellulose, natural flavors, dried plain beet pulp, calcium sulfate, fish oil, potassium chloride, monocalcium phosphate, vegetable oil, DL-methionine, sodium pyrophosphate, sodium silico aluminate, salt, fructooligosaccharides, choline chloride, taurine, calcium carbonate, vitamins [DL-alpha tocopherol acetate (source of vitamin E), niacin supplement, L-ascorbyl-2-polyphosphate (source of vitamin C), D-calcium pantothenate, biotin, pyridoxine hydrochloride (vitamin B6), riboflavin supplement, thiamine mononitrate (vitamin B1), vitamin A acetate, vitamin B12 supplement, folic acid], trace minerals [zinc proteinate, zinc oxide, manganese proteinate, manganous oxide, copper sulfate, ferrous sulfate, sodium selenite, copper proteinate, calcium iodate], marigold extract (Tagetes erecta L.), magnesium oxide, rosemary extract, preserved with mixed tocopherols and citric acid.

Calorie Content

This diet contains 3940 kilocalories of metabolizable energy (ME) per kilogram or 351 kilocalories ME per cup on an as fed basis (calculated).

Nutrient Amount
Crude Protein (min)24.0%
Crude Fat (min)18.0%
Crude Fiber (max)5.7%
Moisture (max)8.0%
Eicosapentaenoic + Docosahexaenoic acid (EPA + DHA) (min)0.19%
Omega-3 fatty acids* (min)0.45%.

*Not recognized as an essential nutrient by the AAFCO Cat Food Nutrient Profiles.

Weight Low Activity Medium Activity High Activity
3 lb (1.5 kg) - 3/8 cup (26 g) 3/8 cup (31 g)
4 lb (2 kg) - 3/8 cup (31 g) 1/2 cup (38 g)
6 lb (2.5 kg) - 1/2 cup (37 g) 1/2 cup (44 g)
7 lb (3 kg) - 1/2 cup (42 g) 5/8 cup (50 g)
8 lb (3.5 kg) - 1/2 cup (47 g) 5/8 cup (56 g)
9 lb (4 kg) - 5/8 cup (51 g) 3/4 cup (62 g)
10 lb (4.5 kg) - 5/8 cup (56 g) 3/4 cup (67 g)
11 lb (5 kg) 5/8 cup (48 g) 3/4 cup (60 g) 7/8 cup (72 g)
12 lb (5.5 kg) 5/8 cup (52 g) 3/4 cup (65 g) 7/8 cup (77 g)
Hydrolyzed Protein HP Dry Cat Food

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Customer reviews

12 Sep 2021

Please go back to original formula.

My cat used to love this food, but ever since we opened the most recent bags after noticing the change of the bag and then noticed she has done a complete 180. Instead of running over to her bowl and eating her food, she now avoids it until she is hungry. We attempted adding warm water and she licks all the water off. I suspect it's due to the formulation change everyone else is mentioning. Something definitely changed, which is a shame given how limited the options already are for HP cat food. Like other cats, her issues with vomitting and her stool which had gotten better on this food is now worse. We will have to find something else.
Gia Mina Miao Miao
12 Aug 2021

Formula Change

We went through several RX foods and this one is the only one our cat could tolerate. Opened new bag and she will not eat it unless she is starving. Even then, she only eats a tiny bit. Very disappointing.
My boy Jax
02 Jul 2021

Formula change resulting in vomiting again

My boy has been working with the vet for the right mix of prescription food, food he could tolerate and food he liked to eat. Finally got the right combination then Royal Canin HP was out of stock most places and upon it's return, the formula had to have changed. I first noticed when scooping into the dish. The kibble seemed different - lighter? Less than 2 days after opening new bag, my boy started vomiting again daily. What changed and why, Royal Canin? Rating would be higher if formula wasn't changed for the worse.
07 Jun 2021

Something changed...cats hate it now

My cats used to love this food, but ever since we opened the most recent bag they have done a complete 180. Instead of running over to their bowls and eating all their food in one sitting like they would before, they now avoid it until they're so hungry that they have to begrudgingly eat it. I suspect it's due to the formulation change everyone else is mentioning. Something definitely changed, which is a shame given how limited the options already are for HP cat food. We will have to find something else.
12 May 2021

Will no longer eat

My cat was on this for a year—opened my latest bag nd he will no longer go near it! He’s pushing 20 pounds so fussiness is NOT an issue. Also had to stop feeding him the companion wet food as he vomited it up almost every time. Royal Canin what on earth did you do?!?
25 Apr 2021

Skin allergies and GI symptoms came back

My cat has been eating this food for a year with success, but about a month to two months ago his skin allergies came back and his vomiting has increased again. I am seeing other comments around the same time as me having issues that the formula was changed and their cats started having issues again. Not sure why you changed the formula if it worked. It is already a really expensive product, why give the owners a headache.
24 Mar 2021

Formula change!

Yup, they did it, a formula change. And with NO labeling of such, simply a new "modern" looking bag. I'm so disgusted that a PRESCRIPTION food can be tweaked without ANY indication. My cat immediately got sick. And yes, I DID compare ingredients on the old and new, and the ORDER has changed, aka, it's listed from most used to least used. Shame on you, not indicating the change.
24 Feb 2021

Royal Canin Hydrolyzed Protein HP Dry Cat food

Obviously the formula has changed. Opened a new bag and my cat is up chucking his foods. No vet problems. Soo what the heck did you do with this food. It smells different out of the bag. Hope this stuff isn't produced in China.
21 Feb 2021

Solved diarrhea issue with my cat, however....

This food worked wonders with my cat who was having IBS and food allergy related diarrhea. I have been feeding her this food for about 3 months and she has had solid stools. However, recently she began eating bits of her clay litter, and the vet did bloodwork and tests, showing she is ok and not anemic. But I am wondering if this food is not quite high enough in protein/iron for my cat as she seems to go to lick the clay constantly for extra minerals. She never had done this before in her life. I don't think it's behavioral nothing has changed other than her food. I would recommend this food highly though for anyone having IBS/IBD issues with their cat, it seems to work very well. A little expensive though..
12 Feb 2021

Only Food My Cat Can Eat

After numerous infections on my cat Mallow’s face, it was finally discovered that he was allergic to chicken. Royal Canin Hydrolyzed dry food is the only food my cat can eat. He has been eating this for about 5 years and he never tires of it. He still looks forward to getting fed every morning! He is almost 9 and is very healthy with a beautiful white coat. I would never feed any animal any other food except one from the Royal Canin line!