You consider the addition of melamine to animal feed (as a source of non-protein-nitrogen) amazing ? Not at all.
That's not the worst tragedy from this kind of practice - yet. At least the current problem is a result of the creative use of the compound, and not from the feed per se.
Do you still remember the drama of bovine spongioform encephalopathy (BSE) ?
Yes, that's mad cow disease. Now we know very well it comes from the use of meat-and-bone meal for the cattle's feed.
Don't go mad. How else could those cows produce sufficient meat if they just feed on grass and grains ?
On the other hand, many cows are now feed on cottonseed meal. Doesn't it sound safe ? Well, friends, this byproduct from cotton (after the oil is extracted) is a rich source of gossypol - an excellent male contraceptive ! (OK, it is also very toxic to creatures with only one stomach - including ourselves.)
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