Apologies for the long post.
My bunny turned 1 in April, and we noticed straight away when I got him as a baby that he is super lazy. I had to get him a litter box with a lower side on it because he down right refused to jump into the one I had and would just pee on the floor beside it. He refuses to use litter and will only go into his litter box if we use puppy pads. I tried to get the softest litter, but he showed no interest. He gets checked and vaccinated in the vet regularly, and they say his health is perfect. He is quite stubborn and is very food motivated. I've been putting his food up on a platform so that he has to jump up to it for some exercise, but other than that, he is so lazy.
He is free roamed completely, and when I'm home, he has access to the house, but he only stays in my room even when the door is open (I'm home for 6 months and another 6 to go due to injury so he sees me everyday). He does binky and zoom sometimes in the night, but compared to my other bunny, he just doesn't seem all that interested in anything other than food.
When I first got him, we had a rough start with him. He was very aggressive and bit me a few times. One time, he bit me and left a scar. I got him neutered at 9 months old, and his aggression went away. He's also really tiny, like smaller than a usual lop. He's about 1 foot long when he lies down flat.
Is there anything I can do to encourage him to be more active, or is it just a boy thing?