Watson will play when you want to play with him or he can just lay there quietly. Sometimes he goes nutso and runs around the house to burn off energy I guess
How is his weight? I notice that if Rudy (11 months) gets a little overweight he loses his energy. Keeping him fit and trim seems to make a big difference. Not always easy balancing the quantity of food with a growing bulldog.
Pan plays in spurts which lasts about 15-20 minutes at a time. Then he needs a 3-4 hour nap. He normally has enough energy to empty his toy basket and take everything to his bed. He may chew on one of them for 5 minutes then he's snoring. It's too funny and normally happens right after I've picked everything up.