One year old hen stopped laying

[mollytinney]

My one year old Plymouth Rock has stopped laying. She was the star layer out of my three girls, nearly every day until on May 18th she had a HUGE double yoker and has only layed two eggs since then, and none for three weeks! She does not act sick or egg bound, she seems happy and energetic, and is not molting. The other two are laying OK, although probably not as much as they were. I'm feeding them the same food. She did get up in the nesting box yesterday and gave it a good try for about an hour but NOTHING! Any thoughts? Does she need a rooster, a vet, some hormones? Help, I really miss all the eggs

 

[Just reebok]

My first thought was that she is molting just from what I have read around here. My pullets are only7 weeks and 4 days old, so I am just throwing it there. Hope someone else can give you some solid answers.