Caribou numbers have declined, or been extirpated, throughout much of their vast range. The mountain caribou population of the woodland caribou is now in danger of extinction. Woodland caribou require extensive, intact woodland to survive. Forestry practices, the increased roads and introduction of livestock ranching, plus recreational activity within caribou habitat, have all negatively impacted the caribou. As they have been told for years by conservationists, you can't quickly (if at all) replace forest habitat. But, of course, forestry, mining, and ranching provide jobs, votes, and tax money, so conservation concerns have been largely ignored.
It's easier to kill wolves. The plan is to kill 24 wolves in the south, adjacent the American border, and to kill 120 to 160 further north. They need to do this before snow melt, which means now. Similar killing has taken place in Alberta for years.
Other non-lethal approaches variously supported by the government, First Nations peoples, and conservationists include catching caribou and moving them south and releasing them into the endangered populations; sterilizing wolves; and capturing pregnant female caribou and penning them so they could give birth and start raising their calves, safe from such predators as wolves, bears, and mountain lions (a process called "maternal penning").