Amazon calculates a product’s star ratings using a machine learned model instead of a raw data average. The machine learned model takes into account factors including: the age of a review, helpfulness votes by customers and whether the reviews are from verified purchases.
Beware you will not receive 185g. The sale is for a 95gram tin. Look closely at the picture. I have already complained about this weeks ago, but it is still listed. (Purchased three cans for my dogs, which they did like bit 1 star for the false description).