Just a theory:
Its a natural transition as most households moved into urban/suburban life style , they moved away from self sustenance and having their own livestock and gardens. Trapping and predatory control is almost non existent.
Coyote population went unchecked and grew into areas so much so that they are now in city limits in Rochester. Last year a Canadian wolf crossed the St. Lawrence and was shot in NY. Guessing more are on their way.