I am new to chicken keeping; we have 3 that we got in April. They are hybrids. One of them started laying almost straight away, a small egg every day. They other two have since started laying as well (all different colour/shape eggs so I can tell which is which). However the one that started laying first has stopped. I don't expect an egg every day but she hasn't laid one for about 2 weeks now.
She seems to be eating and drinking fine. I picked her up and had a good look at her; no sign of mites, straining to get a big egg out or anything else untoward. However when she is in the coop she stands differently to the other two - tail down rather than up. She is also doing this funny sideways movement with her neck that I haven't noticed her doing before. When I'm around though she is as lively as the other two and does peck around and scratch nomally. She doesn't seem distressed. Her comb is pink and not floppy.
Do I need to worry?
Thanks in advance for any help. I am new here but can see I may become addicted!