To equip an item from your item storage to a horse in your stable, select a spare 'equipment' box in your Horse's Profile.
You can only equip one "type" of item at a time (e.g. one saddle, one shoe, one treat) per horse. Items that are broken cannot be equipped. Note: Only VIP's can equip saddles to their horses.
Mousing over the items in the equipment box will display their current condition of repair.
There is a limit to the number of items you can equip to your horse per hour.
The equip limit applies to the whole stable, e.g. a player with an "Amateur" Racer Achievement will only be able to equip 2 items per hour to any horse in their stable.
The number of equips is based on your level of "Racer Achievement". The number of equips per hour you have remaining is displayed in your item storage box.
There is a restriction on the number of items you can equip to your horses per hour. The number of items you can equip per hour is based on your level of "Racer Achievement".
No achievement (less than 50 overall race wins) = 1 item equip per hour
Amateur Racer Achievement (50 overall race wins) = 2 item equips per hour
Pro Racer Achievement (2000 overall race wins) = 3 item equips per hour
Expert Racer Achievement (5000 overall race wins = 4 item equips per hour
The Racer Achievements are displayed in your Player Profile under the "Achievements" tab.