2kg (approx) raw Beef liver chunks.
Liver contains 10 - 100 times the nutrients of muscle meat. Liver has large amounts of vitamin A and several B vitamins, trace minerals and is also a great source of protein.
Feeding too much liver can cause loose stools.   Liver should make up 5% of your dogs daily diet.
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.