From
their website:
- GUARANTEED ANALYSIS
Crude Protein............................................... 19.00% min
Lysine................................................................. 1.15% min
Methionine.................................................... 0.40% min
Crude Fat....................................................... 6.00% min
Crude Fiber................................................... 9.00% max
Calcium.................................... 0.80% min – 1.30% max
Phosphorus................................................... 0.60% min
Salt............................................. 0.25% min - 0.75% max
Omega 3 Fatty Acids.................................... 0.40% min
and this is from a post I made about 10 days ago, comparing Purina's Start and Grow with their Flock Raiser (since you mentioned it):
View attachment 3152700
So, lets go by the numbers, shall we?
Protein: P S&G < LilG < P FR All are acceptable - its the amino acids that matter more.
Lysine: P S&G < P FR < LilG (all of these numbers are good, the difference between 1.1 and 1.15 isn't particularly significant. Off the top of my head, I can think of very few birds which might benefit from that difference - all hi yield broilers in their first weeks of life - but it certainly doesn't hurt)
Methionine: P S&G < LilG < P FR Purina's start and grow is lower, lower than I recommend based on my readings. LilG's .4 is the lowest I will recommend, and a number of breeds - particularly in the first weeks of life - have higher recommends for this figure. UGA now recommends 0.45 for pullets in the first 6 weeks, broilers their entire (short) life, and a suggested range of 0.35-0.45 for adult hens.
Crude Fat: P S&G < P FR < LilG The normal range of recommended fat in a poultry diet is 3.5%+/-. Waterfowl are generally recommended about 1% higher. Broilers are a special case, but we know about broiler health. Here, LilG's fat content is high - not surprising, given their ingredient list.
Fiber: P S&G = P FR < LilG There has been a lot less research done on acceptable fiber levels in a chickens diet. Like us, excess fiber slows digestion, but unlike in humans, slowing a chicken's digestion is not often a net benefit - the exception being high yield broilers on restricted feed diets. The typical recommend for this figure is around 3.5% or 4% - but unlike the fat studies, the fiber studies are much less conclusive. Most feeds that I recall fall between 3% and 6%
Calcium: these products are substantially identical in totals, and well within the expected and desired range. Hat tip to LilG though, some of its calcium is not calcium carbonate, but rather monocalcium phosphate. That is anticipated to have lower long term calcium toxicity concerns than calcium carbonate, but dicalcium phosphate and calcium diphosphate are better studied in that regard. Of course, how much it contains is unknown - but some better than none.
Phosphorus: P S&G < P FR = LilG All of these products have the desired 2:1 ratio, and like C above, are in the desired range. I would slightly favor the FR and the LilG over the S&G because I tend towards heavy birds and heavily boned breeds (like the Brahma) so the (barely) greater numbers overall are a better match to my breeds. "Excess" levels are much higher, so there's no downside to these numbers if you happen to have nothing but production RSL.
Salt: Agreement
So, that's the feeds, based on label. I'm confident you can take it from there.