Wolves as pets and working animals
Generally speaking, on the basis of their experience, tame wolves are strictly "one-man dogs". They may be confiding and playful with the man who raised them, or even with his whole family, if fed and cared for by them, but they are suspicious and timid in the presence of strangers. They invariably retain certain reactions of wolf nature, as for instance, an incorrigible desire to kill chickens or other small livestock whenever opportunity arises.
Cougar
The gray wolf and the cougar compete more directly for prey, mostly in winter. Packs of wolves can steal cougars' kills and occasionally kill the cat. One report describes a large pack of 7 to 11 wolves killing a female cougar and her kittens. Conversely, lone female wolves have in various documented accounts been ambushed and killed by cougars, including in one involving a six-year-old female wolf. Wolves more broadly affect cougar population dynamics and distribution by dominating territory and prey opportunities, and disrupting the feline's behavior. Preliminary research in Yellowstone, for instance, has shown displacement of the cougar by wolves. In nearby Sun Valley, Idaho, a cougar/wolf encounter that resulted in the death of the cougar was documented. One researcher in Oregon noted: "When there is a pack around, cougars are not comfortable around their kills or raising kittens [...] A lot of times a big cougar will kill a wolf, but the pack phenomenon changes the table."