We started out with skinny but added new grains like winter wheat, hen scratch and stopped giving the large laying food and went with crumbles and we also give black sunflower seeds. They lay like crazy and are so heavy sometimes they fall trying to get up to their beds and poor things make a big sound . I hate that . we need to fix it so they won't fall. but just keeping food in front of them all day and we also give electrolytes in their water. if they look sick , they have antibiotics for like a five day treatment. but are they young? It may just take a little time if they are healthy. They start out kind of puny looking at first.
Hope all is well. This is a good place to learn too.
I'm still learning.