I have an 8 month old female red heeler. I also have a toy fox terrier. The fox terrier was never particularly happy when we brought the puppy home. She often growled, but they never fought. We got the heeler when she was 8 weeks old. Recently they got into it and both dogs were very aggressive. I separated them but the fox terrier got hurt, not real bad and seems fine now except now my heeler will not leave the terrier alone. Our toy fox terrier hides from her. Help. I really don't want to get rid of either dog,