About a week and a half ago, I got 4 one-week-old female Buff Orpingtons from my local feed store. Last Friday I added 2 two-day-old Light Brahmas to the flock. That was the day I really started noticing that one of the Orps was developing slower than the others. She is smaller than the others, and has been getting her feathers slower. By now, she is QUITE a bit smaller and is starting to act a bit sickly. She is lethargic and spends a lot of her time away from the flock. She still will get up and eat and drink and peck around, but not the same as the others. She is almost as small as the Brahmas at this point, who are less than a week old! I'm just wondering I guess what I should do. Do I need to worry about her having something that the others will get, or is it too late to worry about that? Or is it just that something's wrong with her making her not thrive that's not a disease? Do I separate her from the flock? Today I'm pretty convinced she's not going to make it much longer Thanks for any input! Here they were at 1 week old when we first got them. And here are the 2 Brahmas. Here's the Buffs the day we got the Brahmas (last Friday). The small one is on the right but it's not very easy to tell. It's much more obvious now. The others have way more feathers coming in and the small one looks just the same. This shows the size difference between them as of today.