I'd buy 4 tarps room size. They are really cheap at places like Harbor Freight, Big Lots ... I've even seen them in Dollar Stores. I would tell my friend about how happy I am with my new furnishings and that I must insist the pooch not be allowed down on the floor anywhere except the tarp room. She will need to hand carry in and out of house. Layering the tarp 4 deep, plus potty pads will keep your goods safe. If you leave him/ her behind for an outing, he/she needs to be crated - no exceptions. A geriatric might get frightened in unfamiliar surroundings and try to scratch at the closed door ... couple of hours of frantic scratching, the tarp is disheveled, carpet gets peed on, maybe do do too. Also, you would end up with bald patches of carpet around that door. Have your friend put something of hers she has worn in the crate. Her scent will comfort the dog.
Good luck!
