canine teeth and bones

i got kipper (my dog) a roasted bone from a pet stall to try and clean her teeth but she won't chew it. so asked the butcher for a bone that isn't dangerous for a dog and he gave some neck bones. she wouldn't touch a raw one so i roasted it. there's lots of meat on it and she normally loves roast meat but she won't touch it. the bone was fresh, i mean it smelt really good out of the oven. :?:

any ideas welcome