Keen Smell. Vodko has advantage on Wisdom (Perception) checks that rely on smell.

Battle Partner. Vodko impose disadvantage to creatures within 5ft that attack his master and gives advantage to his master on attacks againts creatures he attacked this round.    

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

Bite. Melee Weapon Attack: +6 to hit, reach 5 ft., one target. Hit: (1d6 + 3) piercing damage.

Claws. Melee Weapon Attack: +6 to hit, reach 5 ft., one target. Hit: (2d4 + 3) slashing damage.

Rolling attack. After moving at leas 15tf in a straight line Vodko rolls forward for 15ft any medium or smaller creature in the path needs to do a DC 14 Dex saving throw. On a failed save the creature is nocked prone and takes 2d6+3 blunt damage. 

If the attack hits a large or larger creature the rolling stops.