Correct me if i'm wrong:
They have a new formula. As far as i know the old ones were removed from the market because of choking and intestinal blockages. Now they have new formula - they are more chewy so little ones don't choke on them ... and they digest them better, no blockages.
I give little Jackie these babies (Greenies) and it works out just fine! She does not have diarrhea, she eats it quick but never chokes. Of course i always have an eye on her, but i never had problem bit Greenies.
Here's the link to the research. If it helps.
http://writerspad.greenies.com/wp-co...brf_client.pdf
I know it writes "advertisement", but they can't publish some fake research.