Experiences with bully sticks seem to vary. I decided to try them again a few weeks ago (after reading up on them). Bernie and Ginger are both aggressive chewers (although they don't destroy their regular toys). I was dismayed when 15 minutes after giving them the Merrick bully sticks I had to take them away because they had chewed them down to a few inches!
LOL, I guess I just have to keep relearning the same lessons. I really should just follow my own advice and stick to natural bones.