My bitches have regurgitated food for their pups too and would continue to up to 8 weeks if i let them...
My dogs also enjoy short spurts on our running machine (in addition to their normal exercise), supervised of course, they get on themselves & can get off anytime they like, it gives them something else to think about & do and I don't see whats wrong with that
I agree with Spaniel Crazy's points about the book etc especially people forgetting that dogs are animals and not furry people or children, I think people apply far too much human psychology to dogs IMO, i don't agree with the stringing dogs up on choke chains and using electric collars etc...
I think you just need to take away from Cesar Milan the bits that you like (if any) and ignore the other stuff...