Bests & Worsts Reviews from Amazon

Purchased this product on amazon as it was $100 less then what our vet was selling it for and seemed like an awesome deal. Upon its arrival it looked identical to the Vectra 3D that we had purchased from our vet prior. Based on the large price difference, I decided to contact CEVA (the manufacturer of Vectra 3D) to check the lot number to verify its authenticity (as the medication is only supposed to be distributed by licensed vets) and the cost difference seemed to good to be true. I did not tell CEVA where the product was purchased from only that I wanted to verify the lot number. CEVA informed me that the lot number on the package was NOT a valid lot number for this product and that the crimp number on the individual tubes did not have enough characters. They advised to return to place of purchase and not use for fear of making my dogs very ill. The seller on amazon was "Summit VetPharm". Amazon returned the product without issue after leaning of the lot number issue.