You have crossed over the line into the realm of edit war, at this point. One source is too old, one is not scientific enough, nothing is good enough for you, and your only reason is, you think  "it's very very dubious." It's not dubious at all, but is in fact extremely believable. Dubious that Indians crossed their dogs with coyotes? Why? At this point anything I do will be a waste of time because you will just dispute it again. The evidence I have presented is overwhelming and still not enough. I didn't write the article on Hare Indian Dogs anyway, it was written by dozens of Wikipedia editors going back several years. I merely linked it to the coyote article. I am asking you to PLEEEEASE stop. You are not improving Wikipedia at this point, just trying to win an edit war. The evidence I've presented is convincing, reliable, scientific, and undisputed.  Please stop