Cheetah Cubs Growing Up Way Too Fast Published April 22, 2011 • Updated on April 22, 2011 at 12:48 pm Slow it down! We need them to stay in the tiny-and-fuzzy stage! 24 photos 1/24 National Zoo A pair of cheetah cubs -- a male and a female -- were born at the Smithsonian Conservation Biology Institute in Front Royal, Va., in Dec. 2010. But isn't there some way to just keep them teensy and fuzzy forever? No? 2/24 National Zoo The cubs weren't technically siblings -- they were born to two mothers, Amani and Zazi. But because cheetahs can't produce milk for a single cub, keepers placed both cubs together under Zazi's care. The technique of cross-fostering helped her produce enough milk for both cubs, and they're thriving. 3/24 National Zoo We're thrilled they're healthy, but seriously, cheetah cubs, you're getting way too big all of a sudden! 4/24 National Zoo You sullen teenager, you. 5/24 National Zoo According to the Conservation Institute: "Since March, head cheetah keeper Lacey Braun has been training the cubs to voluntarily enter a crate and step on a scale." 6/24 National Zoo "Keepers also target train animals through positive reinforcement; in other words, when the animal demonstrates the desired behavior asked for by the trainer, it is given a reward (with the cheetahs, the reward is usually food). Once the cubs learn to follow the target, this exercise will be useful for training more difficult behaviors," the Institute says. 7/24 National Zoo 8/24 National Zoo Teens need a lot of sleep, you know. 9/24 National Zoo 10/24 National Zoo 11/24 National Zoo So sullen! Listen, mister, you obey your curfew and that's that. 12/24 National Zoo 13/24 National Zoo Mom obviously is ready for a break. 14/24 National Zoo 15/24 National Zoo 16/24 National Zoo 17/24 National Zoo 18/24 National Zoo 19/24 National Zoo 20/24 National Zoo 21/24 National Zoo 22/24 National Zoo 23/24 National Zoo 24/24 National Zoo 0 More Photo Galleries Brag on Your Grad: Celebrating 2020 Graduates in DC, Maryland and Virginia Photos: Protests, Unrest in DC Following George Floyd’s Death Protesters, Enraged by Black Americans Killed, Gather Nationwide NBC4-T44 Friday Fun: Show and Tell!