Last night one of my buff Orpington chicks (15 weeks old) we laid out weak, couldn’t (or wouldn’t) walk and wings dropping when I did stand her up, also very skinny. I stood her on the kitchen work top and she did a massive (and when I say massive I mean, you’d expect it from a cat) poop, which was VERY watery, although the actual droppings were okay, a normal(ish) solid dropping in the midst of the watery and very potent smelling, mucus type dropping. I gave her an emergency mix of feed which I’ve found helps weakened chicks, which constitutes of cat food, growers, and egg yolk. She became a little more energetic. And stood very still, on her own. I kept her separate, and gave her feed and water, and sadly I fully expected she would die over night considering how weak she was. Anyhow, I woke up this morning and she’s okay, stood herself and moving around a little (walking) on her own. However her wings are still slightly dropped, although when I pick them up she seems to slowly manoeuvre then back to where is comfortable, whereas last night they just dropped, without any kind of resistance. I initially thought mareks, as I’m sure any precautionary chicken keeper would. My question is, do I have reason to be particularly worried, and is it safe to put her back with the others?