Cathy's seven-year-old pet "mostly-foxhound"

Five-and-a-half years ago, Cathy Eising asked our experts how she could steady her two-year-old pet “mostly-foxhound” on deer and other riot, so she could walk him in the woods off lead. She evidently achieved some success, since she has contacted us with another challenging question. The foxhound is now a seven-year-old.

Cathy asks, “How can I prevent his aggression towards other dogs who are invited into our house by me with their owners? I would like to be able to have friends bring their dogs when visiting and not have fights.”