NaCl. That's it: just plain table salt. And there really is no such thing as a "medicated" salt block.
They are not and never have been. Ephedrine is not found in medicated salt blocks.
Nowhere. These type of blocks do not exist.
Safe-Guard makes dewormer salt licks to combat various parasites that infect cattle. Bovatec makes salt licks with lasalocid sodium for the purpose of helping increase the rate of gain for pasture stocker/slaughter/feeder/replacement cattle. These two brands are the only known "medicated" salt blocks that is made for livestock; all other salt blocks are not medicated and are primarily of trace mineral, iodine, cobalt and iodine or iron, cobalt and iodine. None of these other blocks are termed "medicated." Also, there is no known company that makes salt blocks with ephedrine or any other drug other than the dewormer medicine made by Safe-Guard and increase ADG by Bovatec. Please see the related links and questions below for more info.
None. No such salt block or loose mineral mix exists.
None because no such block exists.
There really is no such salt block or mineral mix. You can check with your veterinarian or those companies that make livestock salt blocks but it's highly likely you will not find such an ingredient in salt licks for cattle.
Blocks by Bovatec and Safe-Guard are a dark smoky-brownish colour.
table salt and salt licks for cattle food
table salt and salt licks for cattle food
Salt licks are made available for cattle that may be deficient in salt. Most animals do not eat salt unless they need it. Salt licks would not be poisonous to moles - unless that was the only thing they could get with water.
None. No salt licks, mineral blocks, medicated feed or any of that sort have ephedrine in them. This is a myth that has been tested and busted by various scientists that have tried to extract ephedrine from various animal-feed and chicken litter sources. Please see the related question below for more info.
Safe-Guard makes a medicated dewormer salt block, and Bovatec makes a medicated block made to increase average daily gain of pasture stocker, slaughter, feeder cattle and beef/dairy replacement heifers. However, no other manufacturer makes any type of medicated salt block that contains the mythical ephedrine that is claimed to be extracted and used for crystal meth.