Puppy sitting

I get to puppy sit a neighbors puppy, well not really a puppy but a toy breed Pomeranian. That little dog thinks he's a big dog as most Pomeranians do. He will be staying at his house while his owner is getting dental implants Mexico.That is because I am not sure if he will get along with my min pin. The Pom lives with cats so he would not bother our cat but like I said he might not get along with my little guy. I am sure it would be much less stressful to let him stay in his home rather than have him at my house for a week.