Nothing complex at all,my older dog Musclebound is out of Hellbound and Avenshil Madin(greyhound) makes our Harv an half cross.My other dog Hellsfire is out of Hellbound and Mean Little Jean (greyhound think you might know this bitches breeding Stuart) this makes our Duke an half cross too.It's simple reallynot trying to suggest anything ---- but it is a complex breeding program is it not ????If you care to look both of theese stud dogs have lined greyhounds and there is no problem with getting them registered, What are you trying to suggest )