I have an opportunity to purchase some Muscovy ducks, this springs hatchling's, so they're around 7-8 months old. Is this too old to enjoy a roasted duck? My last duck I processed was a bit younger, around 12 weeks old. I don't want to end up with tough birds. I paid $10.00 for the younger duck, this other individual wants the same for the older ones, would it be reasonable to ask for a slightly lower price?