A litter tray is the box a cat uses indoors. Change the litter tray.
The rule is one per cat plus a spare, which surprises everybody who hears it. A litter tray that is not cleaned daily is why a cat starts going elsewhere.
1nounlitter trayThe box a cat uses indoors.
“The litter tray was in the utility room and everybody knew when it needed doing.”
litter tray is a box.
Also accepted in games: litter box
Practised in Pets & Pet Care