Just to double check...you haven't been getting the "steer sticks" by mistake, have you? Nowadays, some "bully" sticks are actually steer sticks, but you have to read the fine print to really find out, and it's a pain - the steer sticks are much thinner than the genuine bullies.
As an aside - I like Bullies for Wylie who is a super aggressive chewer, but I actually like Steers for Marcel who is 3lbs and has a very tiny mouth, for whatever that's worth.