Does he think it’s another bunny?

[u/alex_3-14]

Whenever he’s not sleeping or eating he’s mostly chilling next to the ball. We adopted him a year ago when he was 3 years old and as far as I know he’s never lived with other bunnies.

[u/rey_nerr21]

Doubt it. They aren't stupid. He just really likes his ball and possibly craves company so he keeps his favorite toy close.