Well, I've been emailing mad barn back and forth and learned something, so I thought I'd update in case this is new information to others as well. I knew that the U.S. and Canada were different in terms of what is listed on the labels. Since in Canada, we are regulated at a Federal level and are required to include iron levels in all labels. Apparently, this is able to be bypassed in some States and they do not have to list the amount of Iron in the nutrient analysis, but any that use dicalcium phosphate will be in excess of 2,000 mg/kg of iron. Very interesting to me, as I've often wondered why every supplement in Canada I've looked at lists Iron and there are several in the States that don't.