How Do I Get My Kitten To Use The Litter Box?

My cat is 2 years old and has been litter trained for a year. He will not use the box on his own anymore, he wont even go into another room to poop or pee if it’s put in the box.. My vet said that maybe anemia.. I have had him on Hills Dasuquin for over a week now with no change… Any advice?

Asked by Member 1010173 on Tagged in Behavior & Training