A Blue-eyed male cat has been frequenting our home.
Both Jenny Gray and Gracie Gray howl when he comes. I had
thought the male cat was howling, but he remains quiet.
The girls are not happy with his presence and at one point we
had a confrontation from both sides of the glass.

I've named the visiting cat "Blue Eyes" because I don't know his name
and he has blue eyes. He looks like a near-twin to Gracie.