Warhorse

Trampling Charge:If the horse moves at least 20 feet straight toward a creature and then hits it with a hooves attack on the same turn, that creature must succeed on a DC 14 Strength saving throw or be knocked prone. If the creature is prone, the horse can make another attack with its hooves against it as a bonus action.

Warhorse Armor:An armored warhorse has an AC based on the type of barding worn. If taken as a Sidekick or as a Pet, they are unable to start with armor but it can be bought if so desired. The horse's AC includes its Dexterity modifier, where applicable. Barding doesn't alter the horse's challenge rating. AC Barding 12 Leather 13 Studded leather 14 Ring mail 15 Scale mail 16 Chain mail 17 Splint 18 Plate

Newfound Intelligence:Awakening this Pet means that they are no longer a Tamed Beast and must be taken as a Sidekick. This requires the character to have the Awaken spell, either by asking a fellow party member to cast it or by getting the spell naturally like Druids do, and requires the upfront cost of the spell to be paid first, A 1000 Gold Piece Agate, in addition to the normal costs of a Sidekick.