If anyone can explain how a rat got into a chest freezer. It was the most horrible thing in the world. So moved in and there was still stuff here like a old fridge and freezer. Both gutted from the outside but no holes in them. So I opened the fridge. Nothing to write home about.
My goodness when I opened the bench freezer. The smell was horrible. I started to push the darn thing out of the house almost the same second that stench filled the kitchen. Turns out there have been a dead rat in it for who knows how long.
Did someone put it in there as a joke? I don't know. But there are few things that was that horrible.
The babies in the roof is a problem. They fall onto the insulation and die leaving little biological land mines that you will have to deal with. What you can try is what I used on the outside of the house. Builders have a "Builders 2 hour rapid set Tile Adhesive" Now I didn't use it as intended. I filled the hole from the outside and smoothed it out. It work well enough it didn't crack or anything. Just became rock hard.
But I see products like this and wonder if they work.
Ultrasonic Rat Repeller Bat Repeller KE-917E