All 3 look like hens (over a year old) rather than pullets to me so they may be just about to moult, the third one looks to be missing tail feathers and there are feathers in the cage, so may have started moulting already. If so, you may not get any eggs from them for several more weeks/months.
Feeding them that much bread will not help. Bread is much lower in protein than layer pellets.... they need higher protein, particularly when they are moulting or producing eggs. Layer feed is usually 16%protein, anything else you feed them lowers the % of protein they get in a day, unless it is meat, fish, eggs or insects. Half a slice of bread each once or twice a week might be ok if they are getting bugs or higher protein treats as well. Unfortunately, like us they often prefer the things that are less good for them and will eat bread and scratch before their layer pellets. To keep them healthy and productive, you need to regulate their diet.
Hopefully, once they are back in production they will lay you lots of lovely eggs but it may be a while yet before they reach that point although the second and third birds do at least have redder combs..
The barred bird looks like she might have scaley leg mites....the photo is not good, but that foot looks thick and knobbly.