I've got a four month old lab who is the usual vaccuum cleaner when it comes to scraps. What should (or more importantly shouldn't) I give her with regard to scraps from the carcass? She's happy chewing on legs but should the bones, neck, pelvis etc be boiled, roasted or just raw? How much raw meat is right for a pup? I'd be glad of any advice as I've already had one trip to the vets with her passing blood after a lamb bone!