Flyby. The dog doesn't provoke opportunity attacks when it flies out of an enemy's reach.
Bite. Melee Weapon Attack: +3 to hit, reach 5ft., one target. Hit: 4 1d6+1 piercing damage. If the target is a creature, it must succeed on a DC 11 Strength saving throw or be knocked prone.
Feathered dogs are majestic, loyal and useful pets, whose small numbers contribute to their value and appreciation. Fierce and yet playful guardians, feathered dogs are especially valued by the small races as useful flying steeds and familiars.