Petz: Horseshoe Ranch
This amazing game is great for all horse lovers and has just came out not to long ago! The graphics are excellent too.
Pick a horse from three different breeds and raise them through three life stages: baby, kid and adult. When you first start the game, the horse you choose is at kid stage.
Care for your horse to adult stage and you have the chance for him/her to find a mate! If they fall in love, they will have a baby. The color and breed of the baby depends on the mothers and father's color, but the breed will automatically be the father's.
You can also get codes to unlock special items. One is even a horse! You can even enter contests to earn prizes.
Have fun with this amazing game!