Don't and can't are two different things. Furthermore, Great Danes and Chihuahuas are of the same species. And while there may be no direct genetic mixing bet

Don't and can't are two different things. Furthermore, Great Danes and Chihuahuas are of the same species. And while there may be no direct genetic mixing between the two ends of that spectrum, you can have Chihuahua - Beagle - Labrador - Great Dane mixes (with the '-' being a mix) ... and they're all the same species.