Buying a Property with Property Management Contract

[Casandra M.]

We are in the process of purchasing a property in Wisconsin that is currently managed by a property management company. Does the  contract that the current owners have with the management company legally get transferred to us when we assume the property, or are we legally able to cut off ties with the property management company right away? I am not sure yet if there is a contract with the property management company... I'm only assuming. 

There may also be an issue of what the tenants are paying vs what their lease says. The lease (and property information that we've got up to this point) states that they are paying $670 a month, but when we look at the lease and pet addendum, they should be paying $670 a month + $25 per month pet fee. If they are not paying the $25 pet fee per month for the dog they have, are we legally able to start enforcing that as soon as we assume the property? Our other properties currently also have a $25 pet fee, per pet.