puppy play is rough, I have 2 adults and 3 pups that are 8 month old siblings. 2 females and 1 male . I let them play unless it really gets out of hand. I believe that it's best for them to let each other know when they've had enough. I usually doesn't last longer then 10-15 minutes and only about 2-3 times a day. Actually, I enjoy watching them play their canine way. It's also a bonding experience for them. At night, they all cuddle together to sleep.