These are our 3 dogs from left to right...Ace, Duke, and Rocky. The only animal chasing around our house is by Duke but he is never able to catch anything, so we thought. Last week my daughter called me and said there was a dead rabbit in our front yard missing some body parts. I said ok I'll clean it up when I get home. Needless to say she calls me about 15 minutes later that Duke had vomited hair and guts...nice! She had to clean that mess up! Ace will not chase animals as he only plays with his "racquet balls" and "sneakers" when no one is home. Rocky is older and only likes to lay around...his chasing days are behind him. We also have a cat but the dogs don't bother him.