buy raw bones
Okay.  This stuff does improve my dogs' breath and does reduce the tartar build-up.  But, the problem is the feed.  Dogs are 98% wolf.  Wolves eat raw meat wrapped around bone--not chicken feed compressed into pellets!  I feed purina pro plan chicken and brown rice (a highly rated food in the 'good guide)'.  But, once a month, I spend $3 on a huge frozen bag of huge cow bones with some raw meat left on, from a local meat packing company.  My three shepherds LOVE the raw bones!  Best of all, their teeth are always SPARKLING CLEAN!  And, for cheap!
Rating: 2 stars