SRD
Keen Hearing and Smell. The Sheep Dog has Advantage on Wisdom (Perception) checks that rely on hearing or smell.
Bite. Melee Weapon Attack: +3 to hit, reach 5 ft, one target. Hit: 2-4-7 1d6+1 Piercing damage. If the target is a creature, it must succeed on a DC 11 Strength Save or be knocked Prone.
Loyal Protection. If a creature the Sheep Dog is loyal too is attacked within the Sheep Dogs remaining movement that turn, they can move to that spot if they are able, this can cause attacks of opportunity. The Sheep Dog can also attempt to intercept that attack, with a DC 13 Dexterity Check. If it succeeds, the attacker is Grappled (DC 12 Strength to Escape) instead, and takes 2-4-7 1d6+1 Piercing Damage. If it fails, the Sheep Dog takes half the damage of the attack, reducing the damage to the original target.