I recently adopted 6 pullets from a local farmer who was moving. These EEs are 6 months old, and he had purchased them from the same auction where I purchased chicks earlier this summer. So these birds are from the exact same flock as my girls. But when I picked them up and put them in with my girls...what a contrast! The markings are exactly the same, but the adopted hens were significantly smaller and skinnier. My girls have started laying and these hens don't even seem close. Even their feathers look more dull. They have less energy. They just seem like they've been neglected. I take good care of my chickens, but I don't do anything exceptional. What conditions would have caused these hens to grow so much slower than mine? Is there anything I can do to help them catch up? In retrospect, I know I should have quarantined them. They are free of mites and worms thankfully.