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  1. Yes, hexametaphosphate binds the calcium in the plaque/tartar deposits and serves to break up the deposits. BUT, at what long term cost to the kidneys and the dog’s skeletal health? I think there is a reason why a number of companies have silently taken out the hexametaphosphate from their dental products. Ora-Clens, for example no longer adds HMP to their dental cleaning wipes. And, Hills recently took out HMP from their Rx version of dental dog kibble– So, their non-prescription and prescription versions are now the same as far as I can tell and both are just now large, fibrous nuggets that provide physical abrasion. The Oravet chemicals are also a concern– Effective as shown in human studies but at what cost to dogs given that these chemicals are supposed to be spit out as specified on the human labels.

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