@Julie1148 How long are they staying? I would ask them to leave or board it elsewhere as you are a pet free zone. If they say it's an Service Dog or an ESA, then it should not be left alone per AirBnB's policy ever.
When can a host ask a guest to remove a service animal?
A host may ask a guest to remove a service animal if:
- The animal is out of control and the animal’s handler does not take effective action to control it
- The animal is not housebroken
In either scenario, the host must still give the guest the opportunity to use the premises without the animal if the guest so chooses. Note that given their role in providing service or emotional support, assistance animals should not be left alone at a listing.
https://www.airbnb.com/help/article/1869/what-is-an-assistance-animal