Rubber Duck Software has released an update to their Facebook game "Hooves of Fire" - a social horse racing game that allows players to race, train, buy and sell horses in real time.
The update includes a new feature which allows players to privately stud their best stallions to only selected Facebook friends. The update includes a host of other features including a revamped user interface, increased prize money for higher level players and the ability for players to view their horses progeny.
Hooves of Fire is free to play on Facebook . VIP access (USD$5 per month) grants players extra features such as bonus in game cash, customised saddles and access to the science lab to purchase steroids and various 'enhancements'.
Play Hooves of Fire on Facebook here: http://apps.facebook.com/hoovesoffire/