"My dog, specifically at nighttime, will randomly growl... I was just petting her gently, and she growled. Other nights, we will just simply move, and she will be lying in her crate, and she'll growl.

"After my dog’s TPLO knee surgery, he has a few times now growled at my wife. It is only when we are sitting in the living room (he is in a confined area still) and she comes home from work through ...