I too had heard something bad about greenies so I stopped using them with our last dog. I can't remember what it was though. If I am correct Bully sticks are natural beef and should break down in the tummy if the dog swallows a chunk instead of causing a blockage.
__________________ Mammadoodle to my Yorkiedoodle Barney and our crazy cat Ms. Sassy Pants.  RIP Audrey-Belle 
Within the heart of every stray lies the singular desire to be loved  |