This is why I feed only a white block only. And no, a horse can not lick too much of a white salt block. If so, they drink water. There are no issues of high blood pressure in a horse.My horses love salt. I have the big blocks, and then left over pieces of the block in their feed bins, or I get salt bricks, break them up and put in their feed bins.herefore it never interferes with their current diet. Too much of red salt can cause issues, and I think the hima block also could too. What happens is maybe the horse likes the shape, taste, or needs one mineral or no minerals in the block and then the horse overdoses by licking it so much.