I live in Phoenix and it's very hot in the summer I feed them lay pellets but the girls are plucking and eating feathers and over all their feathers don't look healthy. I ask the guys at my local feed store about switching to a healthier maybe organic feed he replied that it was to hot here any suggestions on giving them a healthier diet
Hmm, I don't understand what your local feed store means about an organic feed being bad because it is too hot for your climate. That makes no sense. It's like saying that ladders aren't good to climb inside your house during winter in Alaska. ?!?!
Does your feed store even carry organic feed? If not, that maybe the source of their answer (ie, they don't "believe" in organic foods).
That said, either your girls are going through a molt or they are picking each other's feathers. If the latter, they may be picking feathers due to not enough protein in their diet. 16% protein is considered a bare minimum amount of protein for laying hens. Many people feed the 16% layer feed AND lots of kitchen scraps. Most kitchen scraps are very low protein and so their 16% protein diet goes down to 11-12%, or even lower. When they go on for long with too little protein, they will start seeking out other sources of protein. Chicken feathers are about 80% protein.
A lot of people (myself included) feed a higher protein feed (17-20%), which layer never comes in that high. Maybe you will find a 17% layer feed. So feed a grower or chick starter and like the OP said, add a dish of crushed oyster shell on the side. That way they get enough protein (even if you feed scraps) and they get enough calcium to lay eggs.