Too many people do some awful things to pets to get back at someone. Just take care of it and charge her out the ass for it, or make her pay you back if you put it in a kennel. Please don't screw with the dog, it didn't do anything wrong.

Charge your ex if she refuses to pay tell her you refuse to give her dog back until she pays you. You owe her nothing charge as high as you want not outrageously high tho. Be sensible about it. Tell her she is not getting the dog back till she pays you for taking care of it. Tell them this is the last favor you are to ask of me seeing as I can't trust you anymore. You can't even go on a simple vacation without some sort of thing going array and be done with it

Its so sweet that your still caring for her dog even though she dumped you. There are a lot of ppl out there who would steal the dog or kill it. Also, get one of your mutual friends to take care of the dog

just cut a nazi cross into its hair befote taking it back, and colour it red

your dog now, or find it a nice new home.

Find on that accepts pay at pickup of the dog, buy the most deluxe option bring dog and then have fun when the ex wants her dog back....

Animal control told me if a dog is arcs residence for at least 2 weeks that's the owner. Legally take the dog.

Take it to the pound...

Kill it

Take care of it everyday except put the dog in a kennel for the last and tell your ex it was there the whole time.