Hi all I'm really scared. My sibling pointed out 30 min ago that after my bunny was biting cardboard he just fell over to his side. When I came up he was laying there but got up and started hopping around and then ate some hay. After eating his hay in the litter box he came out to the play area to clean himself. Soon as he finished that he went on his side again. Me being scared I quickly petted him and got back into a crouch position. After a while he slowly went into his side again. I don't know if it looked natural. I then pressed his feet and he again jumped to life. Now he's hoping around again. He is usually more active at this time. I know my sibling may have upset my bun before she witnessed this as he bit the strings of our blinds n spoilt it slightly. Not sure if he is sick or upset so dno whether to take him to a night vet.