Firstly: I watch some RFD TV and every so often there is a show called "Cattle". In some of these shows there is a cowboy rancher who always says things like, "We have to get mineral into our heifers," or "Mineral is the most important feed you can give a cow or heifer before breeding season," or "We feed our cows and heifers mineral," or "Mineral is one of the most important parts of our breeding program." The last time I was in a chemistry class there was lots of stuff that could pass for "mineral," what in blazes is this guy talkng about? Secondly: A while back someone here mentioned giving a cow or heifer a shot of something to bring them into heat, does anyone know what that something is? The reason I'm asking is; I want to AI breed my five ladies the end of June or 1st of July for calves in April of '06. If they need "mineral" I want them to have it, and if I can breed them all the same day, I can plan for calves within a week or ten days of each other. I'm going to one of those Select Sire AI breeding classes the middle of June.