I found a possum in my spare pen the other day too...smelled it first, then went looking for it. One of the dogs had killed it at some time or other and tried to bury it in the corner of my spare pen...it was covered in maggots.
Bay, is your good dog staying with the sheep all the time now? Can't imagine him letting a possum or cat get past him if he were not otherwise engaged.
Yes Bee it is my coop I run a exhaust fan most all the time but using deep litter
there was only one time I had a problem it is 17 ft in diameter and roughly 10 ft
tall in the center I max myself out at 20 birds but have stayed just below that
Penny Jo, your whole winter coop life would change tremendously if you got aholt of one of these here clear tarps!

I couldn't believe just how much of a change it was when I switched from a regular, colored tarp to the clear for winter time....so much light and warmth comes through that thing! It's like keeping chickens in a greenhouse for the winter.
You must live where it gets seriously cold to have to wrap up your coop like that! We get into teens below zero here and I leave the top half of the coop door open, as well as small windows on either side and the pop door open under the roosts, not to mention 4 in. venting at the roof. If I didn't get that passive airflow going in there I'd likely be dealing with frostbite, especially with the humidity coming off my DL.
Finally got the final work done on the roof liner and tarp today, with the help of my grandgirl...she has great ideas that actually work!

I'm VERY pleased with the end result, though the new tarp is too wide and I'll have to adapt it to fit when I finally lower the side flap for the winter. It fit perfectly in length and this is the best fitting result I've ever achieved on the fastening it all down. I'm tickled with it!
Got the nest boxes cleaned out and refreshed with bedding, dusted those and the roosts, got Ben's dog house refreshed with new straw also, though he rarely ever uses that one...he prefers his hay bunker to a dog house.
Aliza helped all day...she's watching the rooster eat in this pic, he's the big bird to her right.
Stripped down, bare bones hoop coop....ready for a new plastic roof liner. The last one lasted 4 yrs before coming to pieces.
Once again Ben helps by holding down something...this time the tarp. In fact, I couldn't get him to get off it when I needed to put it on the coop. Every time I'd shew him off and grab the tarp to move it, he walk back on it.
The prevailing winter winds go west to east on this ridge top, so it slides right over this hoop coop...the tarp never even ripples in the worst winds.
The dogs were plumb tuckered from watching me work all day.
Ready for winter....will lower that last flap when it truly gets cold.
All that remains to the coop tweaking right now is to jack up the coop and insert some 4x4s under the front to elevate it and prevent sagging in the middle and, hopefully, finally get it level on the top. This coop sits on a slope.