I have not processed one of my birds yet but I have been doing a lot of reading up on it. One of the suggestions I read was to not cut the head off but to cut the jugular and let them bleed out since the brain will "tell" the heart to beat longer if still attached. I don't know if this is part of the problem since it seems like you were doing that when you processed the birds. Also, sounds like you might not have let them rest long enough before cooking? I am watching this thread so that I can learn what not to do when I do process my first bird. I hope you get this figured out.
