We just rescued our 2nd boxer, a 2year old named Belle. Her and our existing male, George (also 2) have been playing for the past 3 days now and it all seemed well. This morning the began to fight over a dog bone. I had a hard time breaking them up because she wouldn't stop going after him. I don't know if this is something we will be able to work through or not, can anyone offer me some advice? I do want to mention that George was most likely the aggressor, because he had a bone aggression in the past that we thought we solved. I hate to get rid of her, but I have 2 young children also....HELP!!