Make sure they are vaccinated, up to date and well behaved dogs when you arrive.I would also require that the dogs have been through some type of training, because most pit bulls are wonderful animals if they have been trained accordingly.

We got vaccinated so that's under control now.

And Pfizer made more money than they ever dreamed possible with a faulty product.VAERS - Vaccine Adverse Event Reporting Systemhttps://vaers.hhs.gov/Shows how dangerous the vaccine really isand yet, with all of that you have "most impenetrable prison of the mind" in a whole lot of people of the covid persuasion.Proof be damned.

(from the title) thought zillow was taking these vaccine mandates very seriously... 

Plus, the vaccine is getting rolled out which will curb the spread tremendously.

No one will ever care about vetting that tenant as much as you and its a great learning experience.  2) Keys should never be handed over until you have copies of all utility transfers and verified, renters insurance, rent for the 1st period due, pet insurance/vaccinations or any other its required in your lease. 

However, since the vaccine rollout started, I saw more and more people moving back to the bay, and I'm confident most tech companies in the bay area are going to adopt a hybrid working model instead of a 100% remote model, which still requires people to live close to the offices/campuses.3.

Proper Vaccination during Rental period2.

Plus, the vaccine is getting rolled out which will curb the spread tremendously.

I am not sure if it is state by state, but I know in Connecticut you can NOT charge any increase in rent or deposit for ESA or SA.One thing I do is request to see the documentation that the animal is properly vaccinated & licensed, I also ask for documentation of the animals training which I have 3 tenants with approved SA's and of the 3 none had any issue showing the information requested.