Sure-Footed: The sheep has advantage on Strength and Dexterity saving throws made against effects that would knock it prone.
Charge: If the sheep moves at least 20 ft. straight toward a target and then hits it with a ram attack on the same turn, the target takes an extra 2 (1d4) bludgeoning damage. If the target is a creature, it must succeed on a DC 10 Strength saving throw or be knocked prone.
Ram:
Melee Weapon Attack: +3 to hit, reach 5 ft., one target
Hit: (1d4+1) bludgeoning damage