When we were listing this past time we stated a small pet was negotiable. However, I also made it clear that there would be an extra deposit.
We don’t have carpet – so I was less worried about fleas.
We had one candidate inform us that she had a service dog and it didn’t matter what my pet policy is/was. I think FLU posted about the absurdity of these rules – basically – call a pet a service animal and you can override the no pet rule.
We ended up with tenants that have no pets. Our previous tenant (extended family) had a small dog. She paid a small extra deposit when she adopted him.