My cat has been on Royal Canin Feline Urinary SO dry food for a couple of years. However recently Royal Canin changed the formula for that food and it is making cats puke. All reviews starting January 2020 have pet owners reporting this problem.

I came across "Purina Pro Plan Focus Urinary Tract Health Formula Adult Dry Cat Food" which does not require a prescription. I would like to know if it is comparable to Royal Canin Urinary SO and if it can be safely substituted?


I cannot make medical recommendations, since I am not a vet, but as pet-owner during COVID-19 pandemic lockdown I suggest you call your vet's office. I was able to get a routine prescription over the telephone from my vet. My cat had been seen at the clinic last fall. Since he is still growing, I had to weigh him on the bathroom scales so the vet could prescribe the right doze. Another time, I called for medical advice that the person at the front desk was able to answer.

All this makes me think it might be worth giving your vet's office a call to ask for advice, since the vet seems to know your cat.

  • Thanks for your reply Sarah. It's been over a year since our last vet visit, and our vet refused to approve any new food or give recommendations over the phone without an in person appointment and a urine PH test. Obviously with the current COVID-19 situation any in person appointment is out of the question.
    – AlexVPerl
    Apr 9 '20 at 20:06
  • I am so sorry for your situation. The only other thing I can think of is to talk to the people who make the pet food. Apr 9 '20 at 20:28

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.