Multiattack. The giant hamster makes three attacks: one with its bite and two with its claws, or it can make one swallow attack.
Bite. Melee Weapon Attack: +5 to hit, reach 5ft., 1 target. Hit: 12 (2d6 + 4) piercing damage.
Claw. Melee Weapon Attack: +5 to hit, reach 5ft., 1 target. Hit: # (1d8 + 4) slashing damage.
Swallow. If the target is of size class small or below, the giant hamster can attempt to put the creature in its cheek pouch. The giant hamster and the creature make contesting grapple checks. If the creature fails, the giant hamster engulfs it and places it in its cheek pouch, dealing 12 (3d6) bludgeoning damage and incapacitating the creature. At the end of each of its turns, the creature may attempt to escape the mouth as it would a grapple. If the giant hamster already has a creature inside its cheek pouch, instead of making any other attacks it may choose to bite down on the creature, dealing 20 (5d6) damage to the creature. A targeted creature as advantage on the saving throw if it has escaped from the giant hamster in the last minute.