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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. Sudden changes in your dog's behavior should be checked by a veterinarian, because aggression can be prompted by pain or health issues. Aggression can be complicated and require professional help, but here's how to recognize five common types and learn how to keep the peace.
1. Play aggression looks scary but dogs tell each other it's just pretend by using gestures like the play bow (butt up, front down). Puppies learn to inhibit bites when they play with other dogs, and owners also can teach limits.
If the mouthing hurts, yelp like another puppy. Whimper and say, "You hurt me." Immediately after you yelp, give the dog a 10-minute time-out -- no mouthing allowed -- to teach him that hard bites end the fun.