Coyotes: They will avoid wolves most times. But when encounters do occur they are aggressive.

Grizzly bears: Are known to eat wolf pups, wolves will chase away bears from the den.

Cougars: Although rare in nature, the cougar being a lone hunter is at a disadvantage in a fight with a wolf pack.

Foxes: Foxes have been observed stealing wolf kills, wolves have been known to steal fox dens, wolves have been known to kill foxes, though it is rare, more often than not they ignore these tiny predatory omnivorous scavengers, the exceptions is in the arctic region where wolves will usually kill a fox on sight.

Ravens: One of the most fascinating relationships between animals is the one that seems to exist between wolves and ravens. The raven, scavenger of food of all types, will often follow wolf pack sin hopes of morsels of food and wolves have learned to watch for circling ravens as a sign of possible food below.Side Note: The Raven and Wolf, are signs in spiritual deities when it comes to passing onto the afterlife. A Raven carries the soul to the land of the dead in native American society, and a Wolf carries one's soul to the land of the dead in Nordic and some Gaelic beliefs.

Tigers: Wolves and tigers once co-existed in India, tigers would prey on wolves. In a modern setting of a safari park in ontario, when a tiger got loose and entered the wolf compound. The 130 pound alpha male wolf attacked the 500 pound cat immediately before workers gained control of the situation.Side note: That was one one one. A tiger Vs. three wolves would not stand a chance.

Dogs: Although wolves are physiologically capable of breeding with dogs, such crosses usually happen in captive situations, trappers tales of wild wolves mating with dogs is usually a campfire myth. Most encounters between wild wolves and dogs are aggressive in nature, it is only natural a dog would be a trespasser in a wolf's territory, small yapping dogs may be attacked as a nuisance.

-the prey wolves prefer are hoofed animals such as deer, moose, bison, elk, and caribou. Working together is vital because wolves normally hunt for large animals. (although wolves are opportunistic and will eat smaller prey.) They work together to catch their prey. Wolves will eat a healthy, strong animal if they can catch it but often they stick with weaker sick animals.

-wolves will also consume grass to wash out their digestive system when they have eaten something that doesn't agree with them.

-Food sources may vary and change depending on the season and geographical area, when large prey animals are in short supply of wolves will prey on mice, rabbits, squirrels, these smaller prey do not provide a substantial part of the wolf's diet but supplement it when larger prey are scarce.

-Skull injury from kicking prey is a highly possible injury to wolves.

-Inter locking canine teeth make it so the wolf can grip and hang onto struggling prey.

-Almost twenty pounds of prey can be consumed in one feeding.