Quote:
The actual amount of protein in a BATCH of grain won't change.
The difference is just in how it's being measured (by WEIGHT)
If you were buying it just to feed, it would be best to buy it dry, but since it's a "by product" for you, it won't matter if you dry it before you feed it, as long as it doesn't get moldy before they can eat it all
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Hello Bear Foot Farm et. al. :
You are correct in that the difference in % protein is a result of the portion of protein (or other component) within total weight - which is the meaning of percentage - "part of".
However it does matter a great deal if the feed is dry or wet.
Consider our target for protein in a single component ration is 20%
For simplicity let's also say a bird can only eat 5 oz (142 g +/-) per day of a feed ingredient which at 8% moisture (92% dry) is listed in US-Canadian Tables of Feed Composition as being 20% protein, thus there is 28.4 g of protein, (142 x 0.2 = 28.4) 11.36 g of water (142 x 0.08), and 102.2 g of "other stuff"(carbohydrates, minerals, vitamins).
In contrast if the same feed is listed at 5% protein at 80% moisture (20% dry) then 142 g has 7.1 g protein, (142 x 0.05), 113.6 g water (142 x 0.8) and 21.3 g of "other stuff".
Thus there is a difference of 21.3 g of protein which means the bird would have to eat 4 times (568 g - 20 oz) the feed to meet the target.
Prof.