How does Bruce react when Chester is being a *attack dog * around him?? Have you and your hubby tryed to leash introduce them together? You hold chester on a leash and your husband holds Bruce on another leash and then let then sniff and if any aggression is showed just pull back and start again! I have a book on terriroial dogs, I could type a few things you could do about this lil prob you have . I really dont think it is as bad as you think. Chester will cower if Bruce becomes agressive, I think. What about you? I read in my agression book that smaller dogs tend to act tuff around bigger dogs intull the larger of the breeds puts the other in place. please take it into consideration to let them meet supervied and on a leash. It might work.