I'm really glad you posted this because I've seen so many different answers. When I had Shepherds we would give them raw meaty bones but were told to NEVER boil or cook the bones as they can splinter. They had amazing teeth.
I too would love to give Lucy marrow bones but have been hesitant because I don't know if there is a reason eveyone seems to be cooking the bones?
I hope people shed some light for you