I have an older rabbit (9-10 years) who has his cage, but also has free run of my room. I am aware his health isn’t the greatest, he’s thin and spends most of his time sleeping or sitting around, which I bring up in case it is relevant to the question. (I’ll get him to the vet when this polar vortex is past, don’t want to take him outside in -4!)
He will suddenly get a burst of energy and become quick & crafty as soon as an opening to one of the “forbidden areas” is opened (the office half of the room, or the doors to the basment/rest of the house). I barricade and lock the door but he’ll sit there gnawing and tugging on it like he’s absolutely desperate to get in to the basement in particular*. There’s nothing for him there, no food or anything interesting, just a bunch of furniture and shelving for him to sit and hide behind in the dark.
Every form of enrichment I try to entice him with fails completely, he ignores it and has no apparent interest in enrichment items, and yet he just HAS to get into that basement as if he’s super bored. I socialize with him whenever he’ll let me but he usually runs away when I approach, he has to be the one to approach me which happens maybe once a day.
Is he just being a little understimulated bastard, or could there be a serious explanation for this behavior?
*fun detail: the door to my room doesn’t seal, it’s basically just a room divider, despite my best efforts he can pull it right open if it’s not locked, and even then he can jiggle the lock loose. not important but very silly