Thanks Bee. So you have had good experience with the white rocks, and the black australorps? What about Sussex or Barred rocks?
If I am maintaining a 15 hen flock do you think I will need to bring in another breed for broody, or do I have a good chance with those breeds, with that many hens?
Yep and they are my two favorite breeds for a sustainable flock, which is what I've been building for and using for many a long year now. In fact, that's my primary focus in a flock so those two breeds fit into that criteria very well. I wouldn't go with just all of one breed...I'd pick your base breed that you want to develop and improve and then I'd also have a few spare hens of other varieties with some of the criteria you want that can fill the gaps until you get your flock developed into the flock you want. Like say, White Rocks as your main breeder but keep some BAs or RIR for a good laying yield while you cull for excellent laying in your WRs. Also keep a few broody breeds to do the grunt work.
If you only want 15 birds it will be a tight game you play but I think it's still doable. Say 8 of your focus breed and a rooster, four dedicated layers and 3 dedicated broody breeds that will eventually need replacing down the road but you can even breed your WR cock over them and produce mixed birds to take over those duties and just keep on trucking. By the time you wear them out you should be seeing some good layer pullets out of your focus group and can phase out your mixed layer birds and then all you will need to eventually replace is your 3 broody breeds.
In the end, if you developed your focus breed for all of these traits you will work yourself into a single breed flock with all the traits you are needing for a sustainable flock.
The reason I love the WRs for this is that I've found they are extremely good on feed thrift, foraging, survival on free range, excellent layers even into the winter months, they lay well for years, they have fast molt recovery, natural hardiness, very little~if any~laying issues, occasional broody tendencies, excellent feather quality and have the biggest meat density of any breed that I've had. To me they are the all round perfect breed.
The BA is a close second but doesn't have the carcass weights of the WR, nor the quick molt recovery and feather quality. But, they are the longest lived, hardiest breed I've ever kept and will lay for up to 6 yrs and beyond with a good rate.