The way I see it if you leave animals on the property eventually they will return,…. No matter what repairs you perform to the building.
The importance of this in some scenarios cannot be understated.
I had a bit of a nightmare-ish raccoon job about 10 years ago
Had raccoons getting under a house in a crawlspace with very difficult access. There was an underground stream channeled next to the structure in a concrete tunnel. Nearest access was 100 feet away in a four foot high tunnel with 6 inches of running water.
Took a lot of hard work carting traps in and animals out. I caught 8 raccoons.
The raccoons swam through the water to get to the bottom of the house. Someone , however was there before me. There was a massive exclusion job done with chain link fence. They even left the construction lights there that they had used to put about 50 feet of chain link fence ( steel not the aluminum stuff )
The raccoons had made holes in the chain link fence by brute force and in such a secluded area could do so without anyone bothering them.
I did a 'patch' exclusion by putting two 4' wide X 25' long strips of vinyl coated 1/2" X 1/2" hardware cloth on top of the damaged areas.
There was no garrentee given. Just a patch job.
I just happened recently to be able to see my work that I did 10 years ago. It held. I was totally shocked.
Removing the animals was key to that job.