On 25/11/2020 10:01, polygonum_on_google wrote:
Remember: Cows have massive bones and are vegetarian.

They have four stomachs though, and have you seen what happens
when a lactating cow gets short of magnesium ?. It's called
staggers.
Highland coows seem to be particularly able to live outside
all year round, even in the north of frigid-land and survive
on a rubbishy diet, so bovines in general must be genetically
resistant to osteo-porosis. This could of course be down to
the fact that they tend not live to 90+, unlike other big
mammals like elephants. :-)