We got the 100 roo chick deal fm Cackle. The chicks are 17 days old now. I am pretty sure that the majority of the red ones are RIR, but there are several with just flat red feathers coming in with not a speck of black of tan anywere. These ones are VERY small compared to the RIR chicks. The BR and Aussies are in the middle on the scale between my massive RIR and the teeny brown/red ones...and the white/yellow ones are 50/50 as well with some being massive and some being petite. Is it normal for one breed to have such a size difference in same-age chicks? I just find it odd that all my black chicks are uniform in size, but the red and white ones have such extremes. The package deal was for egg laying breed roosters, and no one has the thick cornish x legs so I doubt that we got any of those by mistake. It just weird cause I remember our chicks growing at about the same rate when I was a kid... is this normal?