Why are the [Colorado] wolves dying?

From ChaffeeCountyTimes.com:

A male gray wolf felt a pinching sensation in his ​upper left hind leg and shortly after the world went dark.

Number 2305 lay near his mate, a female gray who had likewise been darted, the two breeding adults of the King Mountain Pack in Routt County put to sleep in a routine collaring operation by Colorado Parks and Wildlife (CPW) on Jan. 28. The process was reported as “short” and “benign” by members of the capture crew, but unlike his mate, when the tagging squad got close enough to check vitals on the two Rocky Mountain wolves, 2305’s temperature had spiked.

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