My keets are almost 3 weeks old. Ten of them look their age. One of them looks about a week younger (but was born and shipped at the same time) he had a runt start and then last week started growing again. He is closing the gap in size and feather growth and is now about 1/2 their size. The last one looks like he/she is only a few days old. About 1/4 the size of the rest, and his feathers are coming in slowly as well. Other than his size, he seems healthy. Sleeps a little more than the others, and can't easily flip back onto his feet when the others barrel over him. He seems to eat okay, (he gets bullied away from the food if all the others decide they are hungry when he gets up to eat) but he usually tries to hold his own. When they push him out of the way, he gets under or to the side of them and is able to get a few more bites a time or two, and then gives up... he will end up by himself out of the way while the others finish eating. I have seen him eating at the feeder by himself quite a few times, so I think he's getting the amount of food he wants, even if it's not the amount he needs. He's drinking fine, pooping fine. Background if it helps.... I had lost 20 out of 32 over the course of the first six days and the 12 survivors were on antibiotics for eight days. They had vitamins in the water from days 3-6, antibiotics in their water from day 7-15 I went back to vitamins for a day or so, and now they are on straight water. The brooder is in my house, they have good temps in the box, they lay where ever they want and they don't pile up to get warm or anything. They were on gamebird starter (24%) until 3 days ago when I started mixing turkey starter into their feed at higher and higher ratios until today... they are now on straight turkey starter. (26%) I am emotionally ready for him to not make it at some point if he doesn't start growing, but am wondering if anyone has ever had such a size difference in a runt before and had that runt live into adulthood?