I got 2 bottles of univet prop one thin bottle Lot 100 exp 9/2010 but the box says Lot 210 exp 3/11 then the other is a fatter bottle which says Lot 210 exp 3/11 and the box says the same Lot 210 exp 3/11. whats the deal with this stuff which is legit which is fake or are both faek/legit? is UNVET just a UG? someone let me know whats up