Wolves as pets and working animals
Some wildlife centers housing captive wolves prohibit handlers from entering wolf enclosures if they happen to have a cold or other vulnerability which the wolves can detect. Captive wolves are generally shy and avoid eye contact with humans other than their owner, as well as not listening to any commands made by any other humans. They usually vacate rooms or hide when a new person enters the establishment. Even seemingly friendly wolves need to be treated with caution, as captive wolves tend to view and treat people as other wolves, and will thus bite or dominate people in the same situation in which they would other wolves. Ordinary pet food is inadequate, as an adult wolf needs 1–2.5 kg (2–5 lbs) of meat daily along with bones, skin and fur to meet its nutritional requirements. Wolves may defend their food against people, and react violently to people trying to remove it. The exercise needs of a wolf exceed the average dog's demand. Because of this, captive wolves typically do not cope well in urban areas. Due to their talent at observational learning, adult captive wolves can quickly work out how to escape confinement, and require constant reinforcement by caretakers or owners, which makes raising wolves difficult for people who raise their pets in an even, rather than subordinate, environment.
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.