Slugpup

Slugpups are creatures added in the Downpour DLC. They are unlocked after completing the food quest and achieving one of its endings, upon which they'll begin spawning in shelters on subsequent playthroughs. As they are the infant form of the, they have to rely on the player to survive.

Appearance
Pups are the juvenile version of Slugcats, being smaller in size than adult members of their species. Pups' bodies and eyes come in a variety of different colors.

Abilities & Behavior
A Slugpup is initially afraid of Slugcats, running away upon spotting them. The player can press the grab button to hold the pups' hand or hold the grab button to carry the pup to calm it down. Afterwards, Slugcat must sleep with the pup in a, after which its food bar appears above their own. The Slugpup begins following Slugcat, who may need to throw food to the pup to feed it; though they are capable of taking food on their own, also, including catching batflies and eating most edible objects.

Pups can tug on the player and point as well as pick up and throw items like a and jump over terrain. Upon entering a room with a hostile creature, like, any pups that are not being held will scatter. If any are captured their food bar starts blinking red, alerting the player so they can save them. Pups can also become tired, similar to and other Slugcats.

Trivia

 * Pups were originally Cut Content, being shown off in one of the alpha trailers and not appearing in any publicly available build of Rain World until Downpour added them into the game.
 * Successfully hibernating with a Slugpup for a few cycles will reward you with the Passage of "the Mother."