hello I’m in desperate need of advice. I have a 3 yr old girl Shih tzu cross and a 7 month old boy french bull dog cross pug puppy. They get on well most of the time, the puppy is domineering but I think that has to do with him being a boy. The problem is I can’t play with both dogs at the same time as the puppy takes the toy of the older dog and pushes her if I hold one of the dogs and give them attention while throwing a ball for the other dog the puppy will try and attack the older dog also if my son (he’s 11) plays with both dogs the puppy will attack the older dog. Any advice is welcome.