I purchased four one-week-old chicks from a young man who indicated they were all pullets. Two are Welsummers and two are RIRs. I'm pretty certain my Welsummers are roos (see pic), and now I'm beginning to question my RIRs as well. Can anyone tell me if these RIRs are girls or boys? I've included pics of one of them and they both look the same. The birds are now about 6 weeks old. I also included a pic of one of my Welsummer boys (I'm pretty sure?).