We just got a 9 weeek old basset hound puppy. As we introduced her to the two older males in the house (8 year old Golden and 5 year old Chow mix) the golden got along with her great. Yet my chow mix growls anytime the puppy tries to play or get near him. We thought we could have avoided this problem because of the different genders, but i guess not. Any suggestions on how to fix this problem, and also how long does this last?