The greatest wolf culling, poisoning program in north America occurred in BC in the 1950s. Hundreds of tons of frozen meat, laced with poison, was dropped on frozen lakes in the winter, over very much of central and northern BC, in an attempt to lower the very high wolf population, that was devastating the game animals and ranchers cattle. A game biologist was in charge of the whole thing and he had field men in most localities in the province.
A great deal was learned from that episode, but it seems the majority of people would rather get their information from the Farley Mowat types, while other people make up their own versions of how they think it should be.
I played a role in the program, as well as having a very close association with the game department members involved in it. Thus, I was well aware of every thing that went on and what was learned from it. The program started, in a modest way, in 1951 and ran until 1960, with the last couple of years more of a specialized and clean up affair.
Late in the program the biologist in charge of it called all the field men to a convention in Prince George and every field man told what he had learned and figured out, during the program. I was shared all that went on at that convention, partly because the field man for Prince George, the headquarters of the program, was a very good friend of mine and the two of us together shared a great many trips to an awful lot of wilderness country.
During the course of the poisoning campaign the biologist in charge gave all the field men bags to bring back parts of hollow bones found at kill sights. I have had my friend, the local field man, on flights when I helped him sift through the crushed bones at a kill site, collecting splinters of hollow bones for the marrow on them. When it was over the biologist sent the marrow scraped from the bone fragments to a lab, where they could tell the condition the moose was in when it was killed by the wolves. The lab tests showed that the vast majority of the moose had been in good condition when the wolves killed them!
Under most conditions the wolves can kill any moose they choose to. One of their clever tricks in the winter time is if they come on a moose in the bush near a lake, they herd it onto the frozen lake and once it gets on the lake the moose seldom got more than a hundred feet, or even less. That was why we saw so many wolf kills on a lake close to shore.
Every body and his brother thinks wolves kill moose by ham stringing, cutting off the big cord at the back of the rear leg, then when the moose can't get away, they eat him up. The field men stated that sometimes they ham strung a moose, but if they did, it was just by accident, since they grab at the rear of the moose as it runs from them. I have personally helped to chase the wolves away from two different, freshly killed moose, neither of which was ham strung and each of the two were a very healthy moose, until the wolves came along.