Let sleeping dogs lie. We’ve all used or heard that proverb. It’s the best advice for anyone who has a dog that shows signs of “startle aggression” or “sleep aggression.” Sleep aggression is a knee jerk reaction. Your dog has no thought processes before growling or snapping when his sleep is suddenly or abruptly disturbed. Many pet parents report that usually their dog only growls but doesn’t bite, and would like help to stop the growling. This is a situation where “leave well enough alone” might apply. The reason is that growling is a warning. If you remove the warning you are creating a more dangerous situation. Think of a bomb that doesn’t tick. For pet parents with an invisible fence, it would be like having a setting for a shock with no warning beep. Want to read more?