once your horse is an adult and has 2 hearts you can race your horse in the races.
This is true, you do only need two hearts for you and your horse to get along. But if you wish to actually even attempt to win a race with your horse, love and training is needed. Take your reigns and walk your horse inside of the barn to the front door. When it exits the barn, do the same. Without having anything equipped, stand next to your horse. Face it, and press x. You should now be riding your horse. Ride it for about 9 hours a day, and every day your horse will get a star in training. Good Luck!
Unlike the Harvest Moon Game for Gamecube you can not make your Horse Jump.
You feed it Fodder.
You push it into the barn yourself~
You can have Horse, Sheep, and cow
you buy one at the blue sky ranch
Ride it around town a lot.
There are no Harvest Moon Magical Melody cheats. It's very disappointing, I know.
stand next to it and press Y
Once you build a Barn you can just buy a Horse from Blue Sky Ranch.
It is one of the many harvest moon games
By Petting, and talking to, and hand-feeding, your hourse.
You have to buy them from the place where you can buy animals. Hope this helps. :)