Yeah finding stats on the cows is a weird hassle, on the arreat summit, you have to go to "quests", then click on "the secret cow level", and then click on the gif of the cow to find it.

http://classic.battle.net/diablo2exp/quests/cow.shtml

http://classic.battle.net/diablo2exp/monsters/act1-cow.shtml

The cow and the cow level is level 28 in normal, so crystal swords found there will give 4 sockets. Yes, the item level = Monster level in normal.