I'm trying the same thing. I cook till they are soft enough to to break apart with a fork easily use the larger bone for testing. I think the article mentioned using vinegar to help break down bones. This hasn't been nesecary but it might speed up the time it needs
I don't mince the soft bones the chickens eat it all up. I do mix dry food into soup to absorb it. Mixing this in a five gallon bucket.
This process is done in my shop with an electric pressure cooker. The wife won't allow me the cooktop space.
It is time consuming as well as using electricity so jury is still out on this.
thank you for the information. the duck bones are hard, I fed them well.
I don't know what to say about cooking it in the kitchen. I have been all they with those poor dead ducks and haven't eaten anything. It stinks and I feel like vomiting. I hope to survive. 4 ducks have been chopped and 1 more to be. I reserved more for my dogs and chickens (also fed some cats) and the rest will end up in my freezer and wait till my relatives come to visit. it is not likely I will eat that. I will mince breast meat and try to make some sauce with plenty of veggies. then I will see if I will eat that.