For Creationists.

[Esquilax]

Yeah, actually, in a roundabout sort of way. Prof is likely using the term as a replacement for Genus. He mentioned that dogs and wolves can breed. That applies to g Canis (with notable exceptions), but not f Canidae (no exceptions). We would expect dogs and wolves to be able to breed, as dogs are domesticated wolves. Amusingly, until very recently even though the members of g Canis -could- interbreed the offspring of those pairings appeared to have had very little in the way of fitness (hence wolves and coyotes remained distinct populations). Coywolfs have changed that - and we have a pretty good understanding of why.

For clarity, Prof, would you say that domestic dogs and foxes are "different kinds"? Wolves and african hunting dogs?

No, that can't be it. At least, not consistently, because kind apparently means species when we get to humans, who are in their own kind according to the Professor.