We have four 11 week old EE. They are in a coop large enough for them, i'm not sure of the exact measurements (my boyfriend built it) but it is definitely big enough. It seems like there are a lot of feathers inside of the coop/run. I watched one clean herself and it looked like she pulled a feather out. It isn't so many that it is noticeable they are loosing feathers (they look fully feathered). Is this normal? Is there something we are doing wrong and need to fix? Any suggestions / advice is appreciated! Thank You!!!