My current situation is very similar to what you're encountering. I started with 8 chicks as well and it was a mixed bag of mostly 2-3 day old chicks and a couple 10 day old chicks when I first got them. The smallest chick ended up dying on the third day I had them which was partly due to a heat lamp issue that was my mistake. I'm with the others in the thread though. Post a pic of your brooder setup for others to offer advice. I think i've finally got mine dialed in to where it needs to be after help from the folks here at BYC.Well, now I'm down to 6.