Big size difference in same breed and age?

[Virus]

I have 2 frizzled cochin bantam that just turned 8.5 weeks old, both which I hope are girls but could always be wrong. The 2 bantams are both only a couple days apart in age with the smaller one being the older of the pair. I can't figure out why this is. The both behave about the same and eat just fine I just don't know why she's so small while her sister is huge. If anyone has input or a possible reason that'd be appreciated.

 

[oldhenlikesdogs]

The one looks like it may be a frazzle. Size differences can happen. I see nothing unhealthy about it.

 

[Virus]

The one looks like it may be a frazzle. Size differences can happen. I see nothing unhealthy about it.

Ok good she just has me worried I've raised cochin bantams before and she's just so much smaller then I used to for this age.