Modern day coyote populations are of some 5% (IIRC) wolf ancestry.
But a wolf and a coyote are obviously not the same species.
“A species is often defined as a group of organisms capable of interbreeding and producing fertile offspring. While in many cases this definition is adequate, more precise or differing measures are often used, such as similarity of DNA, morphology or ecological niche.”
Wiki
Sounds like the definition of what separates a species from a sub-species isn’t all that precise .