Do you have any written communication between you and the new landlord regarding the dog?

I seriously think you should cut off all communication with the tenant and hire an attorney immediately.While your attorney deals with the tenants, I think you should do some research and find a quality property manager that can handle this for you before you make a big mistake that will derail your investment career.

There were real estate agents involved during the first attempts at acquiring, then all communications shifted to a law firm representing the bank that owned the property.

One was under contract but communication was jumbled by the realtor and buyer withdrew offer.

You're asking for trouble by letting it go this long without communication.

Keep communication open and verify the boundary is correctly surveyed and staked before the fence goes up.

You need to make a connection with each household and communicate clearly what they can expect during the transition to new ownership.

Form an LLC, and make sure to have open and honest communication with your friend.

Erin,I have communicated with them in the past and was close to pulling the trigger but decided not to. 

Thank you guys, nice to communicate with you all!