We rescued 2 dogs last week. They, and their mother, had been dumped at a park. The mother, sadly, had to go to the pound - we could not take all 3. We were going to keep both puppies, but were advised it's not wise to raise dogs from the same litter together. And, over the few days we had them both, we watched them already struggling for dominance and having little dog fights, which only would have gotten worse as they got bigger.
And so we found a home for one, and have kept one. Guthrie named him Edward, after one of our favorite trains from Thomas and Friends. Since the girls of the family all seem to love Twilight (myself included), it works that way too, although the dog does not sparkle in the daylight.
It wasn't deliberate, but we have black pets. Ursula, the black stray we started taking care of last fall, is not sure what to think of the dog, especially since he stole her bed. She is trying to let him know who is boss, and Edward is learning to be careful around the cat. So far, this is her preferred position to keep an eye on things.