I went out to the coop this am and let the girls out. Poullet our Rhode island red 27 month old hen did not come out. I found her under the perch. This is the first hen we have ever lost. She was fine yesterday. About 2 weeks ago she had some green poop and was acting kind of lethargic but chalked it up to the greens I was feeding them, because the next day she was back to herself. She was eating drinking and pooping yesterday. There is no way it was a predator because they were in secure all night in their coop. Is it possible she could have fallen off her perch and broken her neck? I can't tell because she looks physically fine. I am terrified for the other 7 girls. Do I need to do anything special to the coop? Please any input would be greatly appreciated. I am crushed as these girls are our pets. Didn't realize how much it would hurt to lose one, , especially not knowing if it was something I did. She was a gorgeous sweet girl. I checked her mouth and there was no fluid, not sure what other clues to look for. Sorry for the huge picture. Thanks Erin