Missouri pet fee/deposit

[Travis Lewing]

Hey BiggerPockets.

I have purchased a property and inherited some tenants. When I first walked the property and met them they did not have pets. In between then and the time to sign a new lease with me, they have acquired 2 cats and a dog. I really did not want pets in the rental but also do not want to make them rehome their pets. What would be a reasonable addition to the rent to account for the increased amount of "tenants"?