I don't think you can go too far wrong with having a small can of pumpkin puree on hand - which is the pure pumpkin.
Just in case you have issues with constipation. What you can do is freeze it in zip lock baggies in small amounts once it has been opened.
I use it in the food when I'm making it up. I use between 1 and 2 tablespoons per pound of meat.
Usually the skin is already off the neck due to the way they are butchered.
Hopefully my turkey is thawed out enough by tomorrow that I can get the neck out of the bird and see what the results are of introducing BB to the turkey neck.
I don't think you will have too much trouble with JD and the turkey neck as long as it is used as a treat 2 or maybe 3 times a week in small amounts.
I also get my chicken heart, livers, and gizzards all fresh. The odd time they may be frozen if I get them locally - but into TB they are usually fresh.