I am not sure what to tell you. If the reason you don't want your dogs on your furniture is that you don't want to ruin it or get it hairy, then Mia needs to follow your rules and it should be your friends job to make sure that her dog is not on your furniture. When no one is at home, perhaps you can flip the cushions on the couch from the horizontal position to the vertical position. If your couch doesn't have seat cushions, perhaps put some boxes or something to prevent Mia from climbing up on the furniture!

Shorthaired does not neccessarily mean she doesn't shed. All the PBs I have met shed. Perhaps your friend should have a comfy bed for Mia near the couch. Now when it comes to Mia on the human bed, I don't think it should be a problem. If you are worried about your linens, change them out with something you wouldn't mind getting roughed up.

Drake is not allowed on certain pieces of furniture. He knows what he is and isn't allowed on. Best of luck to you and your friend!