We have had a spastic paresis calf out of a Heatwave daughter, so it is probably in his genetic background. I'd guess it is in many club calf bloodlines. I've seen them out of Heatseeker, Who Made Who, Witch Dr., Who's Your Daddy, and probably a few others I can't think of right now. It would be great to know which bulls are carriers. Any progress on that front from Dr. B, Barrel Racer, DL or anyone else in the know? Until we have a test I guess we will have to figure this out the old fashioned way by breeders sharing our personal experiences with each other. You have my initial input, anybody have any bulls to add to the list? If it matters, the cows were sired by Heatwave, Heatseeker, Foreplay, and Tuffer N' Hell. Makes Power Plant look pretty guilty, but it would be hard to find a club calf bull that doesn't go back to Power Plant somewhere! I don't want anyone to misunderstand - I still use Heatwave, Heatseeker, Witch Dr. and Who Made Who, and believe they are great bulls, but there is that chance of a problem. A test would sure make breeding decisions easier.