What breed is he?
Leave out a bowl of kibble, so he can come & go as he likes. If you don't have a litter tray, consider getting him one.
Bring vocal is a sign on intelligence in a cat. Try talking to him. Sounds silly but it can be as simple as that. Both my moggie and Bengal are vocal, esp when they are bored, want a cuddle, one is hiding.
Do you take him for goals annual check up and jabs?
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