Fighting Mouse Infestation

[Dewain J.]

I own a six unit building, in which I had a filthy tenant on the top floor. This tenant recently moved out and left the place in a deplorable condition. They  specifically had a terrible mice problem. Now that they are gone, the tenants throughout the place are having terrible times with mice. So much so that I've allowed several of them to get cats to help combat it. 

There are two who don't want cats and thus it hasn't helped them. Part of the problem is that some of the tenants are just dirty and leave food and trash out. Now that the other tenant is gone the mice has moved on to new sources of food in this new place. 

I'm looking for any kind of strategic approach to educating these tenants for one, and then also making a big dent in the rodent infestation. Any help would be appreciated. 

This was found in the recently vacated unit: https://youtu.be/lU1n3OJ6Omg

[JD Martin]

First and foremost: block all methods of entry. If you don't do this, everything else is just pissing in the wind, so to speak. Block all methods of access to water. Finally, call an extermination company. It sounds like the problem is far too big to handle on your own, and letting tenants get cats to keep the mice down is actually a waste of time because mice populate far faster than any cat will keep them down - especially if the owner is feeding the cat (I assume they are). 

Bottom line is even if the people at the top were filthy, the mice had to get into the building from somewhere.