I watched this film Robot Dreams the other night
It's a dialogue-free animated film about a lonely dog living in an anthropomorphic animal populated NYC who buys a robot to be his friend and then (for reasons I won't spoil) is separated from said robot for a year.
It was a bit too long, it dragged in the middle, but was also a weirdly moving and ultimately uplifting (though bittersweet-style) film about loneliness, friendship, love, the inevitable need to move on past important relationships etc.
It was very on the nose for me cos I was watching on boxing day in ill isolation in my dark flat and the film opens with the depressed ass dog sitting there in his dark flat joylessly watching TV and eating his ready meal for one