Hills Science Diet Cat Food Market Report: Sales Volume, Market Share, Leading Brands & Market Trends

Hill's Science Diet is the best-performing hills science diet cat food brand in July 2026, moving 58,000 units across 6 ASINs for 59.2% of Top 10 volume. IAMS follows with 30,000 units (30.6%), ahead of Pro Plan Veterinary Diets on 10,000 units (10.2%).

With 3 brands splitting the Top 10 and 100.0% of volume sitting with three of them, this is a concentrated shelf — the leaders hold multiple listings or one very high-velocity ASIN, so a new entrant competes against established review moats rather than an open field. Average selling prices among the leaders run from $21.32 to $35.32, which frames the price band a competing listing has to justify.

Based on July 2026 data, this shortlist surfaces the two kinds of ASIN worth keeping an eye on — the ones that just broke into the Top 10, and the ones growing fastest month over month. Specifically, one ASIN forced its way in: B00ZQYGSU6 booked 8K units at $39.99, with ▲ 33.3% MoM change. On the growth side, B0006342P0 leads positive momentum with ▲ 400.0% MoM growth on 5K units, with B001VJ3GEQ close behind at ▲ 50.0% MoM on 6K units.

The two signals carry different weight. A fresh entrant means share has already changed hands — an incumbent gave up its place to make room, so any competitive set drawn up a month ago is now out of date. A steep growth rate works as the earlier warning: it marks demand that is still compounding, usually a month or two before the ranking catches up to it.