I always order mine from AMD, a member here at YT (
www.westbrookdog.com). She always has a great price. Not to mention they seem fresher and lighter in color than the ones at the pet stores.
Bonnie is so cute when I give her a new one. She lays it in the floor and barks at it. Then she growls, picks it up and throws it, then some more barking. That goes on for over half an hour. I tell DH that she has to "kill" it before she eats it
I am sure bullies have kept her from chewing a whole lot of stuff she shouldn't be chewing.