I was recently checking out blood balls on a site...cool snake...not that i am interested in producing hybrids or anything (not my cup of tea), but I was just curious as how you get a blood and a ball to copulate.......I asked a friend of mine who's bred everything (including venomous) you can imagine........BUT balls. He suggested that they might have been using the old "bait and switch" method. Don't the two species just "know", though...???