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Inside the milk bank creating infant formula for orphaned animals

The world's largest frozen animal-milk bank creates custom formulas to help orphaned infants survive. Now it is working on even better versions to help some of the rarest species

By Corryn Wetzel

12 December 2023 Last updated 20 December 2023

Screaming Hairy Armadillo Pup

Sherman the screaming hairy armadillo pup being fed a custom infant formula

Roshan Patel/Smithsonian’s National Zoo/Conservation Biology Institute

Orca milk smells dizzyingly fishy. Seal milk has a rich orange hue. Reindeer milk, perhaps fittingly, is as thick as eggnog. Not that I am tempted to try it, or any of the other unusual milks I can see stacked on shelves from floor to ceiling. I have donned a puffy winter jacket and stepped inside the freezer that houses the largest collection of animal milk in the world, containing that of everything from tree shrews to two-toed sloths and giant…

Article amended on 20 December 2023

We have corrected who made seal butter, the diet of rhinos and removed a reference to Vlad the two-toed sloth

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