hi pal, you shud be fine with bones an raw, try mixing the bones with tined sardines in sunflower oil to, if you find a whole sale butcher,he should be able to supply you with chicken knecks, chicken backs, bones ect, i got chicken backs for my dog for £2, trim all the fat of, as much as you can, they have kidneys in to, so thats a bonus to, any advice dont hesitate to contact me, cheers screeny,