Coyotes and wolves are different species and they produce fertile offspring.
Who changed the definition?
Negative ghostrider - they are all Canis lupus. Genetically all the various breeds represents reductions in the genetic code variations available, but the genomes map the same.
They are all the same species. Wolves, coyotes and Paris Hilton’s purse dog. One could argue domestic dogs are a subspecies, but that is just for the convenience of taxonomy, not genetics or biology.
p.s. I am a recovering physiologist by education.