wayneL
VIVA LA LIBERTAD, CARAJO!
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My Uncle is a dairy farmer, had quite a few conversations about phosphorus and magnesium deficiency in cattle.
But there is plenty of credible industry and government sources discussing that you can find on the internet that are worth more than a dose of salt.
Here is a link if you care to read a bit more about bone chewing and phosphorus deficiency.
https://futurebeef.com.au/resources/phosphorus-supplementation-of-cattle-in-northern-australia/
Maybe sit out in the middle of a million acre station for a few weeks and see what goes on?
Or maybe out in the middle of Australia like Dr B Hansen did (his PhD project was on horses, but whatever).
I and others that know him are privy to other details not included in his thesis.