I'm gonna say, if you want maximum meat for minimum feed cost, you need to skip the roosters from Cackle and buy some CX. They will give maximum meat for your dollar and in the minimum time. There are also 3month broilers that have a decent return on the investment and good size upon processing, with less health challenges, and are still tender when processed. But the rooster assortment (some sellers call them Fry Pan assortment, etc) is best if you can have them run around your farm, eating the other animals food, and foraging, and you are able to raise them to 5-6 months, and don't care if they're a bit tougher than store bought. Also, they'll be quite small compared to meat birds generally. My current favorite vendor for CX is Welp Hatchery. They have awesome deals in January, if you can find their beginning season special you can get CX for 1.50 per bird, or 1.70 if you want them vaccinated. Be prepared to buy 25 at a time. Their normal price is about 2.15 per roo if I recall correctly, so it's not bad at all even at normal prices.