Aggressive Dogs.

Getty Amy D. Shojai is a certified animal behavior consultant and the award-winning author of 23 pet care books, including "PETiQuette: Solving Behavior Problems in Your Multipet Household." We want dogs to love us, but snarls, growls or (heaven forbid!) bites are dangerous and make it hard to love them back. But dogs aren't evil and you are not a bad owner if you have a growly dog. Forty percent of dogs have growled at their owners at one time or another. There are many kinds of aggression and, depending on the circumstances, some are normal. It's good to understand that growly dogs believe they have a good reason to aggress, whether owners agree, but it still should be dealt with. ...

Jesse Gardner, Flickr Meet Mary Burch, American Kennel Club Canine Good Citizen Director and Paw Nation's expert columnist addressing your questions on animal behavior. Dr. Burch has over 25 years of experience working with dogs, and she is one of fewer than 50 Certified Applied Animal Behaviorists based in the United States. She is the author of 10 books, including the new official book on the AKC Canine Good Citizen Program, "Citizen Canine: 10 Essential Skills Every Well-Mannered Dog Should Know." I have a 6-year-old Lab named Charlie. I also have a new man in my life who has a 4-year-old mixed-breed dog (about Charlie's size) named Kathy. The problem is that Kathy and Charlie don't ...