ok, I also learned from my mistakes as I bought chickens and hatched them....I have dog run kennels with the bottom half covered in chicken wire and the top also with mesh...its connected to the coop.
Side view here, with door that opens and ventilation on top and they can see from that opening as I have branches for roosting, they love the branches
front view, its bolted to the coop, the run is
this is when we were building it and fixing it up, but notice how secure it is
Now through the smallest opening in the gate door frame, I had something go into the coop!!! And I went in that morning to clean the coops and get eggs, Now imagine me locked in there, even the ceiling contained, and all of a sudden I have this brown flash run out of the coop and is running wild all over the kennel run chain link fence, on the WALL!!!! and ceiling, moving so fast I cant see what it is other than a brown streak and Im locked in there with it....I made a dash for the gate door and got myself out finally.
After alittle bit this brown flash stopped, it was a squirrel!!!!! I opened the gate wide and it came out....SO ANYTHING CAN GET IN THAT HOLE WAS SMAL....I MEAN SMALL, THE GAP WAS NOT MORE THAN 1"
Side view here, with door that opens and ventilation on top and they can see from that opening as I have branches for roosting, they love the branches


front view, its bolted to the coop, the run is
this is when we were building it and fixing it up, but notice how secure it is

Now through the smallest opening in the gate door frame, I had something go into the coop!!! And I went in that morning to clean the coops and get eggs, Now imagine me locked in there, even the ceiling contained, and all of a sudden I have this brown flash run out of the coop and is running wild all over the kennel run chain link fence, on the WALL!!!! and ceiling, moving so fast I cant see what it is other than a brown streak and Im locked in there with it....I made a dash for the gate door and got myself out finally.
After alittle bit this brown flash stopped, it was a squirrel!!!!! I opened the gate wide and it came out....SO ANYTHING CAN GET IN THAT HOLE WAS SMAL....I MEAN SMALL, THE GAP WAS NOT MORE THAN 1"