Look, sometimes people make tough choices. The woman
saved the dog. The original owner made an agreement. He saved his dog -- the price was high, but a deal is a deal. Without the woman accepting that ofer the dog might already have been put down.
The man wants his dog back? Let him make a new deal.
Go start a fund to buy the dog back -- that is, if you want to help, rather than be in the whining chorus.