Feeding for hoof health?

[Frumpoon]

where is the best place to get the linseed? Is it still Charnwood? (I think that’s what they’re called anyway)

My local feed shop only stocks the Charnwood stuff

In terms of copper and zinc and other good things for hooves, I got a tub of kossolian salts until I hear back from equimins

Are the kossolian salts likely to cover all the copper and zinc needs? The label wasn't clear if it had the whole RDA