I was just watching a show about Yellowstone. They did a apart about the wolves and that a lot of the wolves are getting Mites (Mange). The scientists are say that there could be substantial die off of wolves due to loss of hair and freezing to death in the winter. The Mites are Easaly transferred to each other because they are so social.
Maybe Mother Nature will do the job on her own. It will be interesting to see if the Gov intervienes to treat the mites.