21 weeks and no eggs...

Welcome to BYC! So, you've only had these girls for 2 weeks? It could be that they just aren't comfortable yet in their new home, they get stressed being moved. It could be that they will start to lay later than you thought so they wouldn't even have been laying if they'd stayed where ever you got them from. I think my White Leghorns started laying at around the 22 or 23 week mark but I can't remember exactly right now. Or, it could be mites or some other pest issue. The neck feather thing could be from mites or from feather pecking due to stress. You need to thoroughly look them over to see if there are any unwanted pests on them and then treat them accordingly if you find any.

If there are no pests then just sit back and give them some more time.

Many people have their nest boxes on the ground and that is just fine. Personally, I like mine up at least a few inches off the ground just because my chickens like to get up onto things.

They are too young to be molting (at least this is my understanding - I have heard of people saying that moving chickens can cause them to go into a molt but I think your's are still too young for that); someone here can correct me if I'm wrong on that.

 

I'm not really experienced enough yet to give an opinion, but I hope they start laying for you soon, it drives you crazy waiting for that first egg doesn't it!

 

My first chickens were 26-28 weeks

 

Like chirpy said, it might just be the stress of a new home. A nest on the floor is fine, I think, as long as it's cozy and 'private'. My chickens shed feathers around quite a bit, and I figured it was just a part of being a chicken. If there are lots of feathers everywhere, do what Chirpy said (again ).

I don't have leghorns, but my RIRs are supposed to be somewhat early layers and one didn't start 'til she was 20 weeks and the other 23 weeks. Make sure they are getting plenty of food and especially water; hot weather also sometimes effects laying, so maybe that's slowing them down?

 

If you just got them 2 weeks ago, it can take several weeks for them to settle in.

Also 20 weeks is about the earliest a pullet will start to lay. You don't want them to start laying to early for the health of the bird. There was actually an article about it in Backyard Poultry, I think the most recent issue. It was about egg laying problems.

 

Also - how sure are you of their age?

 

My four chickens (EE, RIR, Silver and Gold WD) are 21 weeks old today also with no eggs yet. I've had mine since they were a day old, they've been on lay pellets for a week or two, they've got oyster shells, clean water, and plenty of space. Any day now...