I have a 15month old golden retriever who is not interest in food. We've tried all the well known wet and dry foods. At the moment I give him pedigree chunks with biscuits, which he gradually eats most of it during 24hrs and at his evening meal I add fresh boiled chicken. He has however shown interest in pigs liver and I wanted to know if I can give him some either with biscuits or a small amount mixed in with his other meat. Also what is the best way to cook it for him. He weighs just over 24kg. He had three diseases and to parasites when we first had him. Garadia (sorry about the spelling) ecoli and can't remember the other and the one parasite was tape worm. He is perfectly fit and healthy now and is checked regularly by our vet. Also was suffering from malnutrition when we bought him.