Sometimes nature is cruel but there is also a beauty in that cruelty. The alligator, as one of the ultimate predators, can fall victim to the kind of implemented 'team work' strategy which is possible due to the pack mentality and social structure of canines. In the aftermath of the hurricanes in Louisiana dogs were left stranded and because of extreme hunger they reverted to their wild instincts and were forced to hunt in packs for food. See the remarkable photograph below, courtesy of Nature Magazine, of how a pack of dogs overcame the odds and subdued this vicious predator. Be careful not to have children around when you look at this photo, or do not look if you're squeamish!
