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From the website of the (UK) RSPCA:
"Good quality meat can be fed raw, but other meat should be cooked before feeding it. Cooked bones should not be given because they can splinter – sterilized marrow bones available from pet shops are a better option"
From the website of the Australian RSPCA:
"Bones must always be raw
Raw meaty bones such as raw lamb ribs (not lamb chops though), raw lamb flaps and raw chicken wings provide several important health benefits including keeping teeth and gums healthy.
Too many raw bones may lead to constipation. Generally 1-2 raw bones may be offered per week with a few days in between each serving.
The bone must be large enough so that the dog cannot fit the whole bone in its mouth or swallow the bone whole.
Never feed cooked bones as these can splinter and cause internal damage or become an intestinal obstruction.
Always supervise dogs when they are eating raw bones.
Dogs ‘like’ bones very much and sometimes become protective. Do take care and discourage young children and others from approaching dogs that are eating.
Avoid large marrow bones (these have very thick outer rims), T-bones, 'chop' bones e.g. lamb cutlets, large knuckle bones and bones sawn lengthwise (as done by some butchers) as dogs may crack their teeth on these."