I don't know if it was this thread or not--but once the beef bones are cooked, they are brittle and should not be fed to your dogs. I feed my dogs raw bones, never cooked bones (I have several friends who are vets and have to go in and do emergency surgery on dogs that have eaten cooked bones). Not recommended.
On another note--welcome to DC. I hope you enjoy being part of this community. I joined early January and have learned so much from everyone here--not to mention how friendly every has been.