As for the squat I'll take a picture tomorrow of what it looks like so you have an idea of what to look for!Have a question for you too did you raise these birds from chicks or did you purchase them this size? Reason for asking there's been a lot of people who claim they are younger birds when the reason they sold them is because they stopped laying. You can tell if this is the case by checking their legs if they are pale that's a good sign if they are yellow they either stopped laying or they haven't started yet. As for the feathers falling out it could mean the bird is in molt which could mean why she's not laying or she could have mites. I would check her feathers and see if you see any creepy crawlers