Well, I got a call from the PM company and she said she left a message for the owners. If they don't call back by 4:30pm, she may go ahead and override them and let us have the dog.
But she said that even if they do call back, the fact that the prior tenant had a dog is encouraging. That dog left no damage.
So, hope is rekindled. :-D
Woohooo!
FWIW, putting Cisco on hold was a leap of faith on my part, too. They wouldn't hold him for very long, and I didn't have the fence built or anything. I just knew he was the one and hoped something would work out.