I think I have bought my last Greenie. They were expensive, too.
Plus he still got tartar on his teeth!
Jasper loved them though.
Fortunately no problems as my boy is a very neat and tidy chewer---he creates pieces about the size of my finger nail.
I know this because he chewed an entire multicolored rubber wobbler type toy (looks like an atom); and I found little colorful bits all around my yard.
I felt so bad for not selecting a better toy for him.
I'll stick to stuffed Kongs--they can be so much fun!
What else I can use to plug the ends? I won't buy the Kong stuff...too much $
He gets his kibble in it-
I use cheese; PB; or stick mini Old Mother Hubbard biscuits in the ends.