Just from my own experience, I think the growling is because she can probably hear male dogs outside nearby.. Probably within the same block. I know that Sunshine was like that... and at night she growls the same way if she hears a neighbors dog. We usually don't hear anything but she races down the stairs and out into the back yard to bark at some little noise she heard. The male dogs will come around while she is in heat and possibly she is hearing them. |