Mastiff

Keen Sense The mastiff has advantage on Wisdom (Perception) checks that rely on hearing and smell
{t}Bite — Melee Weapon Attack:
+3 to hit, reach 5ft., one target.
Hit: 1d6 + 1 (avg. 4) piercing damage.
If the target is a creature, it just succeed on a
DC 11 Strength Saving Throw or be knocked
prone.