Apparently they are not all the same. Here is a link to a site that offers 'low odor' bully sticks.
Are All Bully Sticks Processed the Same Way? | Don't Your Pets Deserve the Best?
The site's a little funny to navigate but here's the link if you want to order.
..for the straight ones...
Straight by Gibdog Pet Supplies
..for braided...
Braided by Gibdog Pet Supplies
..and for round ones....
Round by Gibdog Pet Supplies
Hope this helps!
