Hello, we adopted a 1yo fixed male boxer pup. He’s been at the house for nearly 2 weeks now. He’s very vocal, and it doesn’t seem that he received any training in his previous living situation for managing his excitement and emotions. He gets along well with dogs, we also have a 5yo female boxer. When he’s playing, things tend to get intense, and he will start biting/nipping me (or my husband) on my hands, arms and ankles, pulling on the sleeves, and constantly jump on/at us while growling and barking. He no longer has the jaws or the muscles of a 3-month old puppy, so it can be painful and upsetting. It doesn’t seem to be coming from aggression, but intense playing. On the other hand, when he’s enjoying some downtime, he's the cuddliest dog. The previous foster family that took care of him confirmed that there is some definite separation anxiety, which we have seen whenever we leave the room. I’m not sure what to do to break the cycle of the aggressive playing, as this is the first time this has happened to us with a dog. Any advice would be greatly appreciated! Thank you 🙏