One that is deliberately bred from two pure bred parents of different breeds, in order to get a puppy that combines both of their attributes. (thehappypuppysite.com)
Because the condition is congenital and likely has some genetic cause, affected dogs should not be bred and careful thought should be given to breeding the parents of affected dogs. (pethealthnetwork.com)
Breed specifications apply to mixed breeds as well, so try to be as sure as you can what breeds the parents were. (pethelpful.com)