Hi, I have Himalayan, male, neutered cat. Lately, he has been spending alot of time in the litter box. I took note one day and on average he went twice an hour in the morning but, then in the afternoon he didn't go more than once. His eating and drinking seem to be fine and he is very active. Ocassionaly, he comes out of the box and lets out a howl. He also spends alot of time cleaning his personal area. I am quite concerned can you explain why he would do this.
This sounds like a urinary tract infection. I recommend a visit to the vet. vetcare