$1,500 is up for grabs when you play in the Udder Madness tournament. Play the five reel slot Cash Cow in this event. This event runs until June 24th. Milk the Cash Cow and win your share of $1,500 in prizes! Tournament name – Udder Madness Game – Cash Cow Buy in – $5 Rebuy – $5 Date – June 12th to June 24th Lincoln Casino has slot tournaments and freerolls everyday! Powered by WGS.