Hi Rhonda

I think you have to channel his play into acceptable games. All puppies play agressively but you're right that in a large dog this could quickly become a problem. Has he got a cuddly toy, a football or a tug toy that you could channel his play into? Could you teach him to fetch a stick or a frizbee or a ball? This is quite tiring play for the dog so might tire him out and give you a chance to sit down in the evening.

Laura