Purina Pro Plan Veterinary Diets CN Critical Nutrition Formula Canned Dog & Cat Food, 5.5-oz, case of 24

Prescription Item

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    $59.99 FREE 1-2 Day Shipping on this item

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This item requires prescription approval. Details

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Purina Pro Plan Veterinary Diets CN Critical Nutrition Formula Canned Dog & Cat Food is designed to help manage the nutrition of dogs and cats that are critically ill or anorectic. This formula centers on providing a concentrated energy source and an optimal nutrient profile to support your pet in recovery. The smooth texture allows this protein-rich formula to be easily administered via syringe or feeding tube, so you pet can begin to experience its benefits as quickly as possible.

Key Benefits
  • This energy dense formula provides concentrated nutrition to your dog or cat that is critically ill, anorectic, or recovering from surgery.
  • A smooth texture makes assisted feeding with a syringe of feeding tube easy.
  • Added antioxidants promote overall wellbeing and high protein and fat content provides nutrition for your pet when they need it most.
  • High palatability and digestible so your pet can experience it benefits quickly.
  • Made in the USA!

Prescription Approval

This product requires a veterinary prescription. Simply provide your vet's information during checkout and we'll follow up to confirm. If you have a copy of your prescription, you can expedite the approval process by taking a photo and emailing it to vetdiet@chewy.com, or by faxing it to 1-800-619-7973.

  1. How To Order

See all items by Purina Pro Plan Veterinary Diets

  • Item Number
  • Brand

    Purina Pro Plan Veterinary Diets

  • Packaging Type


  • Food Texture


  • Brand


  • Breed Size

    Small Breeds, Medium Breeds, Large Breeds

  • Food Form

    Wet Food

  • Lifestage


  • Made in

    United States

  • Special Diet

    High-Protein, Prescription Food

Nutritional Info

Water Sufficient for Processing, Meat By-Products, Beef, Liver, Poultry By-Products, Corn Oil, Rice Flour, Artificial and Natural Flavors, Tricalcium Phosphate, Potassium Chloride, Guar Gum, Oat Fiber, Calcium Sulfate, Magnesium Sulfate, Choline Chloride, Dl-Methionine, Taurine, Vitamin E Supplement, Zinc, Sulfate, Mono and Dicalcium Phosphate, Thiamine Monoitrate, Ferrous Sulfate, Niacin, Copper Sulfate, Calcium Pantothenate, Vitamin A Supplement, Manganese Sulfate, Menadione Sodium Bisulfate Complex (Source of Vitamin K Activity), Pyridoxine Hydrochloride, Riboflavin Supplement, Vitamin B12 Supplement, Biotin, Potassium Iodide, Folic Acid, Vitamin D3 Supplement, Sodium Selenite.

Caloric Content

1,337 kcal/kg, 208 kcal/can

Guaranteed Analysis
Crude Protein 9.5% min
Crude Fat 7.5% min
Crude Fiber 1.5% max
Moisture 75.0% max
Feeding Instructions
Weight Hospitalized Cats (Cans) Adult Maintenance (Cans)
3 3/8 3/8
5 5/8 5/8
8 7/8 1
10 1 1 1/4
12 1 1/4 1 1/2
14 1 3/8 1 3/4
16 1 1/2 2 1/8
20 1 3/4 2 5/8
25 2 1/8 3 1/4

Adjustments must be made for environmental conditions, activity level, and body condition. Provide fresh water in a clean container daily.

This daily amount should be divided into several small meals throughout the day.

For each additional lb of body weight, feed an additional 24 kilocalories.

Transition Instructions

With your veterinarian’s approval, offer increasing amounts of the new food with decreasing amounts of the old food.


Why should I buy Vet Diet food online?

Shopping for Vet Diet food is easy! Chewy experts are available 24/7 to answer your questions and guide you through the process. We offer competitive prices, free shipping on orders over $49, and more savings if you sign up for an Autoship subscription.

How do I order Vet Diet food?

  1. Search our website for the diet your vet recommends, then add it to your cart. You can purchase your Vet Diet food with any other goodies you need!
  2. At checkout, you’ll be asked for required information. Enter your pet’s name and type your vet’s name and telephone number.
  3. Place your order, and we’ll take care of the rest!

How will you contact my vet?

Our Vet Diet team will personally contact your vet for approval. If your clinic needs more information from you or recommends a different diet, we’ll let you know immediately.

Does it help if I send you my prescription?

Yes! If you have a paper copy of your prescription, email a picture to vetdiet@chewy.com, start a chat, or fax your prescription to 1-800-619-7973.

Can I use a prescription written by a veterinarian out of state?

Of course! We can accept valid prescriptions from anywhere in the United States and Canada—that includes US territories, like Puerto Rico.

Why do I need a prescription?

Veterinary diets are formulated with the precise ingredients and nutrients needed to address specific medical issues. If you don’t have a paper prescription, no sweat—once you provide your vet’s information, our team will take over.

Can someone else (such as a caretaker or family member) place an order for my pet?

Yes, but we’ll need them to provide us with your full name or the pet’s owner’s name via phone, email or chat after the order is placed, so the clinic can locate your pet’s records when we contact them.

How can I help expedite my order?

Just follow these simple steps: 1. Create your pet ’s profile on Chewy.com. 2. If you have an Autoship scheduled, but you’re running low on refills, contact us ahead of time to let us know if you have a new clinic or if any prescription information has changed. 3. If you have a prescription handy, send it to us before you order—by sending an email to vetdiet@chewy.com, starting a chat with one of our experts, or faxing us at 1-800-619-7973.

Do I need to set up a pet profile?

We recommend it, but it’s not required. You can create your pet’s profile by logging in at Chewy.com, hovering over your account, and choosing “pet profile.”

Do prescriptions expire?

Yes. Your vet will tell us when your prescription will expire and how many refills we can send before they’d like you to check back in with them.

Can I set up auto refills?

Yep! Sign up for Autoship and we’ll automatically ship your food for as long as your prescription allows. If you run out of refills, or your prescription expires, we’ll automatically contact your vet for a new approval. If we hit any bumps in the road, we’ll let you know right away.

What if I have more questions? How can I reach the Vet Diet team at Chewy?

Email us at vetdiet@chewy.com, start a chat on Chewy.com, or call us anytime at 1-800-672-4399. We’re here for you 24/7.

Customer Reviews
27 Reviews 27 Reviews 4.6 out of 5 Stars

93% Recommend

93% of reviewersrecommend this product

4.6 / 5

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  • He likes it!!

    By on

    This food prolonged my boy's life. He couldn't get enough of it.

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  • Food cans damaged

    By on

    My 11 year old cat had an esophagostomy tube placed after being hospitalized for a week when she wasn't eating. The price here is better than at the internist's, but I can't use 8 of the cans in the case. The food we have been able to use has helped her gain a little weight back, though, so that is a good thing.

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  • Dog didn't like it.

    By on

    Unfortunately my dog wouldn't eat the purina pro plan. He is 13 years old and the vet had recommended it. I bought a case and he wouldn't touch it. Now I am stuck with a case of unused food. I recommend that anyone purchasing this food do it in single cans not the case. It has a different smell to it. My dog smells it and walks away. I tried numerous times and no go. Therefore, I can't comment on how well it provides nutrition or not.

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  • Pup Loved It

    By on

    Helped my pup heal up quicker after her surgery, and she loves it!

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  • great cat food

    By on

    the best in the market have not found anything at this price

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  • My sweet ferrets

    By on

    I have 1 ferret with IBD and another ferret that is 11 years old. both are supplemented with this and are doing wonderfully. Our old man ferret gets a thin gravy from this to encourage him to drink more.

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  • Great for Dogs

    By on

    I have a 4 year old Chihuahua. He has lymphoma. It makes it hard to swallow. He’s normally a tiny little thing. Well his weight started falling off to the point that I got really worried. My veterinarian prescribed Purina CN Critical Nutrition. His weight picked up within two weeks of feeding it to him every day. I’m glad to have it for the poor little guy.

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  • Love it for my kissa

    By on

    Had my kissa on evo, they don’t have anymore so I switched to this. She’s very tiny and has a lot of digestive issues. So working so far!

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  • Extra calories

    By on

    We have a “senior” female min pin who has been losing weight and is getting a little frail. Her vet suggested getting a few extra calories (without impacting her kidney issues) by adding this to her diet. It seems to be helping and doesn’t have any of the negative effects we watched for.

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  • Great service!

    By on

    This food is what it is and did what we needed it to for our little fur buddy. I was concerned about the possible delay of shipment due to this requiring a prescription and Chewy would need to contact our vet during business hours. I had already gotten a digital written prescription from our vet. I called Chewy customer service and was provided an email address to send the prescription. They rushed it through (I called at 8pm EST) and my order was shipped the next day. Really pleased!

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