@Lindsay410
You really can’t let people use the unfair review system to hold you hostage.
The worst offenders know very well how to do this and will use it to extort refunds, flagrantly violate house rules, and abuse you personally.
The key is prevention.
That can start with your review of these rule-breaking guests. Maybe they were ignorant of the rules because they didn’t bother to read them. Or anything else. Tough Tortillas.
I would mention in my review that they violated the strict no-dog policy and that this will not be tolerated again. Guests who show up with unauthorized pets will not be allowed to check in until they have made other arrangements for their animals.
Unfortunately you are required to accept service animals but it’s better not to mention that, although professional cheaters already know and come prepared with fake documentation.
As for the Airbnb security deposit— The Tooth Fairy is in charge of that and you’re lucky if you can get a dime out of her. (There is no security deposit.)
You can be polite, apologetic, but firm about refusing to allow people to bring dogs with them. It’s not your fault. The owner is deathly allergic and will fire you if he gets a dog hair up his nose. Or maybe have to be hospitalized, and they wouldn’t want to pay for that, would they?