Chester Zoo's Rare Tree Kangaroo Birth Puts Pouch Life Back in the Spotlight
A common misconception is that the pouch fills with waste over time. While an active joey does urinate and defecate directly inside the pocket, mother kangaroos manage cleaning through routine physical grooming.
The mother leans backward, props open the pouch opening with her forepaws, and inserts her entire snout into the cavity. She methodically licks the hairless glandular skin, removing droppings, shed skin cells, and dried fluids. Her saliva carries naturally occurring antibacterial properties that clean the chamber without disrupting the joey’s fragile skin balance.
As the joey approaches six to eight months of age and begins scrambling in and out of dirt and foliage, this grooming intensifies. Mothers carry out these internal cleanings several times daily until the joey is permanently weaned.
