Speed 50 ft.
Unless specifically trained for combat (see the Handle Animal skill, a horse's hooves are treated as secondary attacks.
Environment temperate plains
Heavy horses are larger and heartier, bred for labor such as pulling plows or carriages. These horses gain the following adjustments to the base horse statistics:
A heavy horse gains the Advanced Simple Template (already applied here). In addition, it also gains a bite attack that inflicts 1d4 damage, and its hoof damage increases to 1d6. As with a light horse, a heavy horse can be specifically trained for combat with the Handle Animal skill.
Heavy horses stand 5 to 6 feet tall at the shoulder and weigh between 1,000 and 1,500 pounds.