Hen 46 wks but still no egg!

Hi

I have a hen who has never laid, she is 46 weeks. She has is healthy and is red but still no egg appears!
She is on layers pellets, like my other hen who laid right up to Christmas and then just started at the weekend again

But with Rose there is sill no egg! I know with the longer days approaching that might help but is there an age when you can say that she is not likely to lay??

Any info would be great

My 2 Exchequer leghorns are 46 weeks this week and one of them has never laid.  The other one started at 33 weeks on and off, but both girls are the same age!

Mind you, saying that, my little Rosie the Amberlink never did lay an egg!!!!   

I'm still waiting for my oldest girl to lay she is 45 weeks and showing no sign at all! I have two younger girls who also aren't laying, aged 40 and 35 weeks. There 'sisters' have all started to lay, I don't know if its the breed - two are Pekins? They are eating plenty though!