Amazon is the place to shop and this seller is exceptional.  Mistakes happen, but it's the way the mistakes are handled that convince a buyer that a seller is one to trust and use repeatedly, as we shall this seller. We were looking for a booster for our dog and decided on  this one after reading positive reviews. We received the product promptly, but there was a tiny perfectly round hole in the bottom of the vial through which much of the gel had leaked.  We were very disappointed, as our pup really could have used an immune booster. The seller arranged immediately for a refund and sent a new bottle of the gel without charge.  What more can be said?  Trust this product and this seller.