Petco Text Logo
Petco Pet Logo

How can I tell which of my two cats is peeing outside the litter box?

Updated On September 23rd, 2025

Pet's info: Cat | Russian Blue | Female | 14 lbs

DO THEY MAKE FOOD SAFE FLUORESCENT DYE THAT YOU CAN GIVE CATS WITHOUT HARMING THEM. i HAVE TWO CATS AND ONE OF THEM IS URINATING ON THINGS AND AM HAVING A HARD TIME FINDING OUT WHO. HAVE DONE ALL THE TESTING ON THE SUSPECTED CAT AND THE PRESCRIPTION BEHAVIOR PILLS, CLEAN THE TWO LITTER BOXES 2 -3 TIMES A DAY. CAN NOT PUT 2ND LITTER BOX UPSTAIR. AT MY WITS END.

1 Answer

Most Helpful Answer

Image profile

Answered By Daniel Fonza, DVM

Veterinarian

Published on January 3rd, 2018

Hi there and thank you for your post! Unfortunately there is no dye that you can feed a cat that will cause the urine to become luminescent. The best way to try and determine which cat it is would be to put them in individual rooms with their own litter box and see which one it is. I hope this helps! Please feel free to contact me with any other questions or concerns that you may have.

Vote icon

1Pet Parents found this answer helpful

image
Have A Vet Question?

Book an appointment with the pros – our expert vets are here to help.

Sponsored