[jq]The experience share item has nothing to do with EVs, it only shares experience gained from each battle. So the EVs aren't going to transfer to Miltank unfortunately. Pokemon only receive EVs if they are the one to KO a wild pokemon.[/jq]
Um... Exp. Share does share EVs though, last I checked. Also, in my experience, a Pokemon just needs to gain experience points in battle in order to gain EVs.