I'd talk to your vet about it. Wally is pretty young but I do know that if they lie around too much, the fluid can build up quickly. That's what took my Puddy because she had been so sick for so long and the fluid built up so inactivity isn't good. I wouldn't want to advise you one way or the other so talk it over w/your vet and try not to worry so much. He's young so you more than likely have a lot of good years left w/him.