Check out this article for some questions that should be addressed on that agreement.Realistically they are on the note with you, so I would place the responsibility on them (as much as possible) to help find a solution.

Just look at value add solution. 

I guess a fence could be the best solution, but I wonder would others just evict the tenants animals?

There may be some solutions where a contractor can increase the duct size or put fans inside the ducts to push more warm air to those rooms.

I doubt this is a likely scenario but I just want piece of mind knowing theres a solution to this should it ever be a possibility.

Hi everyone,I am a newbie investor (full-time travel nurse) looking to make my first deal happen.  Currently I am in the St. Petersburg, FL area and have been looking for multifamily property here and near my hometown...

It is an imperfect solution and imperfect world, unfortunately :-/

We offer builders risk from many companies and can tailor solutions for your exact situation. 

Using multiple digital solutions, I've automated communications, pricing, and digital access (locks).

Better to do your research and commit to a solution before you run into the problem, and best case scenario is that you never have to utilize that protection.