DIGEST-EEZE are the first and only Beefhide Chews treated with a unique and innovative 100% natural system for easier -to-digest, more delicious Beefhide Chews your dog will love! Digest-Eeze was developed with the help of veterinarians and food scientists in the US and abroad. After extensive testing in kennels and labs, including meticulous analysis of DIGEST-EEZE benefits to your dogs digestion, we submitted all the results for revalidation.This all Natural system pre-treats beefhide with an all natural enzyme making it more digestible and palatable. Proven results 60% faster to dissolve and 99% digestible. Dog Preferred 38:1.SALIX