I do remember an itemized bill from somebody showing the exact mix of his custom ground meatie feed , but nothing else . I used to mix feed at a feed mill and before that also did the mixing for the feedlots on a large farm in which things were adjusted to the high lysine corn we grew for feeding . Both simply used protein , mineral , trace mineral , and vitamin suppliments according to formulas supplied by Purina or Kent . The Cobb management link I posted on another thread does have the exact proportions of nutrients listed , but buying supplements that come in bags or buckets that will be used to mix many tons of feed just isn't an option for small scale operations . Since I'll be feeding on very small scale starting next month , I'm starting with one 40 lb bag of 21% meatie feed which I will boost up to 24% for the first week , then by the third week the CornishX selected for breeding will be down to 18% and those chosen to cull adjusted down a little also , probably to a straight 21% . When allowed [ or forced LOL ] to pasture graze , their diets are automaticly lowered in protein unless their getting a lot of bugs , certain seed heads , etc. . A pasture penned chicken on grass will not be getting much protein off that green grass if they eat it .
