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.
Wolf hunting
Some hunt proponents argue that large numbers of wolves are central to the spread of numerous infectious diseases because of their nomadic nature. Diseases recorded to be carried by wolves include rabies, brucella, deerfly fever, listeriosis, foot and mouth disease and anthrax. Wolves are major hosts for rabies in Russia, Iran, Afghanistan, Iraq and India. Wolves in Russia have been recorded to carry over 50 different kinds of harmful parasites. A 10-year study in the former Soviet Union showed that in some regions, every successful wolf litter in spring coincided with a 100% increase in cestode infections in moose and wild boar, with some specimen having up to 30-40 cysts. It also showed that where wolves were absent, the number of cysticerosis infected wild ungulates was much less. Despite their habit of carrying harmful diseases, large wolf populations are not negatively influenced by epizootic outbreaks as with other canids, and thus some hunting proponents argue that disease cannot be a guarantee of naturally controlling wolf numbers.