A 1kg (approx) bag of frozen, raw duck wings.
Raw Duck Wings are a great starter bone for younger dogs over the age of 10 weeks. Packed with soft bone, cartilage and connective tissue, they are delicious and crunchy.  A great treat. 
Feed as part of a raw, nutritionally balanced diet for working dogs. 
Disclaimer:  Dogs should be supervised at all times whilst feeding and always provide plenty of fresh water for your dog.