These are 2 RIRs Supposed to be the same age. Edited to add: They will be 4 weeks this Saturday. : FYI the reason the one has a yellow zip tie on it's leg is because I read some where on here that the RIR chicks with a stripe on their head indicated it might be female. So just for the heck of it my DBF helped me band the ones with stripes to see what happens. Out of the 9 birds I have left, 6 of them are about the same size as the one on the left. The one on the right is the smallest of the bunch. I have one only a tad bigger than that one with spraddle legs. It has improved drastically since when we first discovered it was spraddle. The 3 of the smaller birds is in between the biggest and the smallest size-wise. And my bro-in-law got his birds yesterday. They are Cornish Rocks. He bought 12. They lost one last night. They are cute though. We have to keep reminding my nieces that they are food not pets.