Largest chick slow to feather?

[eggheadsmom]

New to this so I can't post pics yet.

We have 6 little peeps somewhere between 1 and 3 weeks old. The RIR and the wyandotte are much bigger than the other 4. The RIR has tons of feathers both wing and tail but the wyandotte only has a little bit of wing feathers and no tail feathers. The 4 younger smaller peeps all have more feathering.

Could this mean that she is a he?

 

[needtohatch]

With my chicks that are the same breed the males seem to take longer getting their feathers. Different breeds feather out at different rates though so can't really use that to tell.