i started my first dual-purpose flock with 2 golden laced wyandotte (1 a rooster), 2 silver laced wyandotte, 2 speckled english sussex, and 1 each delaware and austrolorpe. all met my basic requirements that they be good year-round egg producers, extremely cold-hardy for my vermont winters, and at least somewhat broody. at the start of my second summer, i had come to like the sussex most of all - an intelligent, friendly, curious, and docile bird - so i raised 3 batches of 25 females in moveable pens as meat birds. by the end of the summer i had become fed up with the wyandotte rooster and had fallen in love with the sussex; so, because i also had a male in my last batch of meat sussex, i butchered the original mixed flock, and kept 10 sussex hens and the rooster to become my permanent dual purpose flock. they are a delight, and i only have to remind the rooster who is king of the pen about every two or three months. generally, if i give him something to do while i'm collecting eggs, feeding and watering, and keeping the hen house cleaned, he leaves me alone. so that's when i take out the kitchen compostables and dump it in the deep woodchip run for the birds to pick through while i'm working in the hen house. only if the hens get curious enough to come see what i'm up to will he come along and periodically try to show me he's really king of the roost. he learns not much more easily than did the wyandotte.
summer 2016 i raised the english sussex meat birds on field grasses and free access to local vermont-produced organic broiler feed. when i slaughtered the first batch at 12 weeks, their dressed out weights ran from 2.25 to 3 lbs; when i butchered the second batch at 16 weeks, their dressed weights ran from 2.5 to 3.0 lbs; when i butchered the third batch at 18 weeks, their dressed weights ran from 3.0-3.5 lbs. when i butchered the original flock at about 16 months (about 66 weeks), the two sussex hens weighed about 5 lbs each.
those who say heritage birds don't have a great feed to meat conversion ratio are quite correct. if your main goal is meat, the quickly growing cross is probably better. i won't raise them because of their health and structure problems. i think it's unethical and unnatural. (i understand: that's just my opinion.) this summer i will try the rangers to see if i can get more weight in the same or less time.
for my permanent flock, i can't be happier with my english sussex. they live in an enclosed house and run because of all of the predators we have here, but with plenty of room. i could grow my flock to 20 birds without cramping them, and will do so by letting them go broody. (last spring I had two hens go broody - a sussex and the austrolorpe; between them they produced 5 chicks, 2 males; ugly as sin with their mixed parentage.) this flock of 10 provides me an average 5 eggs a day, right through this very cold vermont winter and with no added heat or light. their offspring will be just as pretty. they also like to fly a bit, so i will install some perches and swings in their run when the weather warms.
if you want a dual purpose permanent flock that will reproduce itself, i'm a big fan of the speckled english sussex. if you want to raise meat over the summer for your freezer or to sell, i think the rangers may be a better option, although it will be summer 2017 when i test that theory for myself. but you certainly won't get the highly efficient conversion ratio of the fast-growing cross.
my main goal is to secure chicken meat i want to eat; my secondary goal is to grow enough extra birds to pay all of my expenses for raising my own meat and egg birds. going into year two i have enough present and interested future customers to be able to do that at the price i need to charge (about $4.50/lb) for these slower growing, better quality birds.
last year i apprenticed to a chicken abbatoir who butchered on my property; this year i will butcher my own. saving the money i spent on having someone else butcher my chickens will pay off the equipment i need to do it myself in 2 years. i will also be equipped to butcher for my rural neighbors who grow their own summer and fall meat flocks, if i want to make a few extra dollars close to home.