I've been studying this problem for quite some time now... as I too would like a self-replenishing meat / egg flock..... the way our grandparents did.
I've decided to cross 6 varieties of chickens, with two years for each cross to stabilize a bit, build up numbers, and "select prime specimens" for the next breeding; so a minimum of 12 years to get this project well underway. I'm also working on chickens that can handle the extremes of weather here. We get 100+ degrees w/ 85% humidity in the summer, and days below freezing in the winter. AFTER I get the bird's conformation the way I want, THEN I'll work on coloring, etc. I may also add the Dorkings and Minorcas at a later time, both are also Heritage Dual Purpose birds.
I've just gotten some Buff Orps, and a RIR roo, I already have NHR hens. Let the fun begin!!
Good Luck!
Kathy
Rhode Island Red / New Hampshire Red - 6.5-7.5 lb. early maturing, daily layer, winter layer; hardy in both heat and cold.
Delaware - 6.5 lb/2.9 kg crossing Barred Plymouth Rocks and New Hampshires, nearly white, rapid growing, dual purpose fowl developed to figure into broiler crosses, with single comb and brown egg shells.
Faverolles - Standard: 7.5 lb/3.4 kg the 1850s of composite blood from the Houdon, Brahma, Crêve-Cour, Dorking and common fowl of the area. Some references have been made to the CouCoo and Cochin being used in addition. They make excellent back yard fowl and have a genteel personality. originally known for its table qualities. Density and mass of the bird are what should be looked at.
Orpington - Standard: 8 lb/3.6 kg; moderately early maturing; hardy; very cold hardy; good brooder; excellent mother; It was developed from Langshan-Rock-Minorca crosses. Developed as a dual purpose breed, Orpingtons make fair table fowl and are excellent winter layers of large brown eggs. Orpingtons have a deep broad body, the back appearing short with a somewhat concave shape. The head is neat with a single comb. Dark colours have dark eyes and legs, paler colours have red eyes and white legs. Chicks can take longer to feather up than some other breeds.
Sussex - Standard: 7 lb/3.2 kg; moderately early maturing; robust; very cold hardy; good brooder & mother; English heavy breed; famous as a table fowl and the cocks should weigh in at 9 pounds, with the hens reaching 7 pounds; One of the best of the dual purpose chickens, a good all-around farm fowl. prized as a table fowl more than 100 years ago; Sussex is one of the oldest breeds that is still with us today in fair numbers. Sussex go broody and make good mothers
Welsumer or Welsummer - Standard: 6 lb/2.7 kg; moderately early maturing; economical eater; well adaptable to confinement or free range; lively, but not especially flighty; energetic; friendly; hardy; cold hardy; large dark brown egg, a rich deep flower-pot red brown, almost glowing. Although considered a light, soft feathered, nonsitting breed, the hens frequently do go broody. Welsummers are good foragers on free range. Black/red is the standardized color of the large form. Predominantly a utility breed, the breed is hardy and thrives under free range conditions producing good numbers of its dark brown, 'flowerpot' coloured eggs. However, although classified as a 'Light' breed and usually very active, their bodies are fairly large and the birds quite docile. Most people consider the colouring very attractive and reminiscent of a traditional 'farmyard' bird.