There's no evidence for power feeding one way or another with snakes. But when asked, the breeder put breeding over the health of the animal. To me, that makes him a jerk. If I took that out of context or misunderstood, please correct me and I will eat my words. I haven't met this breeder but based on the statement of "[I]'d rather have a female breed for [me] sooner than live to be 20 years old." and considering the captive life span on a ball python is 20-30 years, I'd call him a jerk and wouldn't do business with him.