Eh. Sorry to hear about the mice problem. Have you tried sticky traps? Is it an older home? My in-laws had a mice problem not too long ago. They have an older house and I think the mice squeezed in somewhere from the basement. They got it all patched up and taken care of. They leave a huge dish of dog food out - and it was by the house which attracted the mice and under the dog house - rats! Ugh.
The muscovies sound very interesting. So, would they be considered a good beginner duck? Can you put up netting to keep them from flying or is wing trimming the only way to go about it?
I am going to have to rebuild my coop so that my chickens have better digs. Maybe, I can at least build it with the ducks in mind for the future. Hmmm?

I only want eggs, not duck meat, are they good layers? Can you have a male and female or is there a certain ratio like with roosters and chickens?
Oh, I just rememered. When we first put our house up there were some tiny holes next to the piping that weren't totally sealed in the basement. We had a mama mouse and a nest of babies that we found pretty quickly. Anyway, I was upstairs and heard dh scream like he had fallen and broken something. I come running and see him standing paralyzed by fear from the nest of baby mice.
I was the one that had to dispose of them. Lol I have never let him live that down. We have lived here for over 20 years now!