Sea otters lick and fluff their newborn for hours, causing their pup’s fur to retain enough air to act as a floatation device.
Wolves feed their young by carrying chewed-up food in their stomachs and throwing up, or “regurgitating”, the food for the pups when they come back to the den.
Wolf packs are established according to a strict hierarchy, with a dominant alpha male at the top and alpha female not far behind. Usually this male and female are the only animals of the pack to breed. Packs consist of between five and ten animals – usually offspring from several years. All of a pack’s adults help to care for young pups by bringing them food and watching them while others hunt.