[MacDorcha]

Don't need to, ask a vet. (the pet kind) They see cross breeds and mutts all the time.

Or better yet, my neighbors with the husky/wolf dog.

[bobdsmith]

I meant the bit about all dog breeds turning into the one true dog again.

I think what would happen is all the aesthetic dogs created to look nice would go extinct, and the more wolf-like ones would survive.