Nugget is the smallest of three. He has always been behind the others in size and feather change and he would shake much more easily than them, but seemed fine, we assumed he hatched later. We know there is at least a few weeks in age difference. Now he seems to be feeling bad, today I found him just sitting on the ground while the other two were out foraging, and he didn't want to get up. Usually I can herd them by just walking with my arms out, but I had to physically lead him in. So he can walk just fine, but he doesn't want to. I put them all in the barn where they sleep at night, to keep them together and inside. He ate and drank when they got inside, then he sat down again. This was six hours ago and he hasn't changed. Additionally, I found some blobs of green poop in their sleeping quarters. Looks a bit slimy, and dark green. I can't find anything wrong with him other than green poop (assuming he's the one who dropped those) and the fact that he seems so sleepy. The shaking has subsided gradually. The other two are fit and healthy. Oh, he's about 3,5 months old now. And no, I don't know for sure that he is a he. Any thoughts?