Sparky the Sumatran tiger earned his stripes earlier this month when he a cub he sired was successfully born.

13-year-old Sparky was brought to the Smithsonian National Zoo with the express purpose of breeding (some even called him a “Sex Tiger“). And it looks like he and the zoo’s female tiger Damai hit it off—the proof is in the pudding.

Two weeks after the birth, zoo officials say the cub is a probably a male and he’s doing just great.

Born weighing about three-and-a-half pounds, the cub clocked in at six-and-a-half pounds on Wednesday. (Keepers managed to weigh him when Damai left the den to eat and defecate.)

When he has his first veterinary exam in the coming weeks, the zoo will be able to confirm the animal’s sex.

The cub and Damai are not currently on display, but visitors can see three-year-old tiger Bandar, Damai’s firstborn, and Sparky at the Great Cats habitat.

Sumatran tigers are considered are critically endangered by the International Union for Conservation of Nature, with about 300-400 living in the wild, per the zoo.

So keep sexing, Sparky—it’s for the good of the species.

Previously:
Squee! The National Zoo Has A Tiny New Sumatran Tiger Cub
Meet Sparky, The New Sumatran Tiger At The National Zoo