Newborn wolf pups look similar to German Shepherd Dog pups. Females have two functional uteri and give birth to litters of six to 12 pups. Litters range from 10 to 80 pups. Litters consist of one to 9 pups, which are born blind. Small hot dogs called "pups" are also featured menu items. The number of pups born in a single litter varies geographically. The union resulted in a litter of nine pups. One female was pregnant and gave birth to six pups. Only about half of those pups survive and become yearlings. Males take an active role in raising the pups. It lives in permanent packs consisting of two to 27 adults and yearling pups. There, regurgitation of water by the females for the pups was observed. Males in captivity often participate in raising the pups, including the regurgitation of food. Mothers have been known to carry their pups for days after the pups' deaths. Sometimes, an invading male abducts pups, possibly as an attempt to control the females.