
NO! dont put the bones in the oven!! COOKED bones are very dangerous, cooking makes them hard and brittle, aways give them RAW!
you need to get some books and do lots of research before switching to raw, you need to undestand the basics of how to create a balanced diet. this involves giving raw meaty bones, (chicken wings, necks, thighs, quarters or whole birds) along with extra muscle meat to balance the bone, a lot of people dont understand the bones should be really meaty, not boney with a few scraps of meat on. it is also important to give offal like liver, kidney, tripe, hearts, fish, eggs etc. and fruit and veg and most important to give lots of variety to ensure they are getting a good mix of nutrients and all their vitamins and minerals. i give my lot large marrow bones or cow ribcages to chew on a couple of times a week. i normally take them away after a day or 2, depending on how much the dogs chew them and how rotten they the bones are looking :) !
if you want any help i can e mail you a sample diet of what i feed mine and suggest links and book,
kelly