I dont think you have done any harm. What works best for you is what you need to do. I wouldn't want very young chicks (up to say 10 or 12 weeks) on layer and giving your sick hens a higher protein starter when they were not laying anyway should be ok. I have my 5 month old pullets on layer now because I have merged them with my other layers. The concern about layer feed with young chicks is the added calcium, it can cause kidney damage. Some breeders use feed with 20 plus percent protein for thier birds. You have also heard or read that too high of protein may cause poulets to start to lay too early. I am not sure how often this happens and I think it is more likely to happen with high production hybribs. Alot of the study on chicken feed is based on the $ cost per egg. Protein is expensive so the idea is to have just enough without paying for any more than needed. I hope this helps clear up things a little bit confused . I am sure there is alot I dont know about the subject.

Bill

Bill