but now I have a little yellow girl that does not lay eggs but lately she has taken to never leaving the nest as she lays on her run mates’ eggs.
Has she been on the nest for 3 days
and nights...leaving the nest only to eat and drink?
You'll need to decide if you
want her to hatch out some chicks, and how you will 'manage' it.
Do you have the space needed? She may need to be separated by wire from the rest of the flock, I highly prefer this method. I put her in a wired off area of the coop with some fake eggs until she settles again,
then give her fresh fertile eggs. Then I don't have to worry about other hens laying in the nest or harassing her.
Do you have a plan on what to do with the inevitable males? Rehome, butcher, keep in separate 'bachelor pad'?
If you decide to let her hatch out some fertile eggs, this is a great thread for reference and to ask questions.
It's a long one but just start reading the first few pages, then browse thru some more at random.
http://www.backyardchickens.com/t/496101/broody-hen-thread