Hey everyone.

My rabbit, Fidget, is 6 years old. I've had him since he was old enough to leave his mum and I've never had any problems with handling him or anything. He's always liked being picked up and cuddled.

But lately, when I take him out of his hutch he starts to shake, as though he's scared. Today I sat with him on my knee to brush his fur (which he has always enjoyed) and he was sat very low with his ears flat against his back and I could feel his heart beating rapidly. It was as though he was scared of something.

He went to the vet last week for a regular checkup, and there were no problems, he's a very healthy boy.

Could this just be due to his age, or should I be worried about something more serious?