Beware the Dog. During an owner’s long rest, any enemy or potential intruder within 20ft. must make (or repeat) a Dexterity (Stealth) check against the dog's Passive Perception. On a fail, the dog wakes up and uses its bark to alert all allies within 120ft. This takes the dog one action.

Elusive. The dog can take the Disengage or Dash actions as a bonus action.

Keen Hearing and Smell. The dog has advantage on Wisdom (Perception) checks that rely on hearing or smell.

Pack Tactics. The dog has advantage on an attack roll against a creature if at least one of the dog’s allies is within 5 feet of the creature and the ally isn't incapacitated.

Multiattack. The dog makes two attacks: one with its bite and one with its claws.

Bite. Melee Weapon Attack: +3 to hit, reach 5 ft., one target. Hit: 3 (1d6 + 1) piercing damage.

Claws. Melee Weapon Attack: +2 to hit, reach 5 ft., one target. Hit: 2 (1d4 + 1) slashing damage. If the target is a creature, it must succeed on a DC 8 Strength saving throw or be knocked prone.