Feisty Fido by Patricia B. McConnell, Ph.D and Karen B. London, Ph.D. If your dog shows signs of aggression toward other dogs while you are walking him/her on leash, this book is for you. Does your dog bark, lunge, growl or try to bite or attack other dogs while on leash? Whether these are truly aggressive displays or your dog is just very difficult to control because he wants to greet or play with every dog he/she sees, it's something you need to get under control. This book will give you a few options to consider and help you to teach your dog to be calm and well-behaved while on leash.