I get mine from eddieb260 on eBay - I get the steer stix for Marcel (they are thinner, even then Marcel can't do much w/ it but he tries

) and the bullies for Wylie - I get him the 12" bullies and then my hubs saws them in 1/3rds - so I end up w/ triple the amount. Wylie is a very aggressive chewer, btw.