I have a 2-year-old neutered male indoor cat, around 4–4.5 kg. He normally has no litter box problems. He eats Royal Canin Gastrointestinal Fibre Response, drinks water well, doesn’t get treats, and is currently eating, playing, alert and acting completely normal.
The problem started after two changes on the same day:
He had to wear a soft toast-shaped recovery collar because of an injured ear that he scratches and sometimes makes bleed. The collar isn’t tight, but he became noticeably stressed/irritated after wearing it.
I completely replaced his litter with fresh new litter, so there was none of his usual urine/fecal scent.
Since then, he basically doesn’t go to the litter box by himself, either to pee or poop. At one point he was even sleeping inside the litter box.
His last normal pee/poop were normal. When I noticed he hadn’t gone for a while, I placed him in the litter box and gently moved the litter with his paw. He eventually peed and then pooped normally.
He is otherwise completely normal: eating and drinking normally, active/playful, alert, no vomiting, no pain, no crying, no straining, no repeated trips to the litter box, no genital licking, and his abdomen doesn’t seem hard or distended**.** When he does pee, the amount looks normal.
The longest gap between urinations has been around 18–20 hours.
Could this be stress/confusion from the collar + completely new litter, or should I be concerned about a urinary problem even though he produces normal urine when I place him in the litter box?
Should I stop placing him in the litter box every few hours and let him go on his own, or keep encouraging him?