DSD is on her way home with a stray puppy she found outside school, it's quite young apparently and has no collar. They've been knocking on doors to see if it belongs to anyone and so far no one is claiming it. I've said to bring it home if they can't find the owner.
What should I do if she comes home with it? We already have a dog (no idea how it will react to another dog coming into the house) and were not planning on another.