Which preposition to use with interbred

with Occurrences 2%

Domestic dogs can become, and again and again do become, wild, even consorting with wolves, interbreeding with them, assuming their gregarious habits, and changing the characteristic bark into a dismal wolf-like howl.

as Occurrences 1%

Between some of the non-human species (horses and camels, for instance) instinctive mutual hatred, as distinguished from fear, does seem to exist, but nowhere, as far as I know, is it found between varieties so nearly related to each other and so readily interbreeding as the various human races.

Which preposition to use with  interbred