I'll start out by saying mutts lay eggs too. Any sexlink has been bred for a specific reason, which is to tell the sex and the point of hatch. This characteristic is not passed on via breeding. Most of those breeds are used for egg production. If you're looking for a breed that will in-turn breed and get you more birds you should look for something that goes broody often, like an Orpington. However, your going to be giving up some egg produciton. IMO my Buff Orpington's don't lay as much, or as large of eggs as my Red Sex Links. On a side note, my Barred Rocks are consitant layers, but I've never had one go broody. Just for the sake of the flock, I'd go with one or two Roos. A good roo can be protective, especially if you planned to free range. AS to your original question. I have ten adult birds who go through a 50# bag in about two weeks. The adulds get an abundance of scraps and have some free range time. I also have ten 10-week olds that go through about 50# in a two week period also. But, this is about 98% of the ration.
