Should I allow Corgi dog on my new Berber carpet?

[Alicia Zhao]

Hi, Met a lovely young couple who are interested in renting our luxury condo in Palo Alto. The only thing I am hesitating about is they have a corgi dog. She said it is her psychologist prescribed service dog to ease her anxiety, so it is a "service dog." But our new Berber carpet costs $8,000. I never had any dogs and not sure if you have experience with Corgi. They said he is well trained and never pees on the carpet. I need your advice. Thanks!