Kirkland Signature Fuels Costco’s Dog Food Share Gains

Download our latest report to explore how Costco gained dog food market share, driven by Kirkland Signature across Dog Food.

Shopper behavior within dog food shifted meaningfully in 2025 as Costco emerged as one of the fastest share gainers in the category. This report examines how Costco captured share across Dog Food, the role of Kirkland Signature in driving that growth, and how shopper spend reallocated across retailers.

Using transaction level data, the analysis highlights market share shifts, brand and retailer switching behavior, and changes in purchase patterns, offering a data driven view into how Kirkland Signature is reshaping competitive dynamics within dog food.

In this report, you’ll get:

• Market share changes across Dog Food retailers
• The role of Kirkland Signature in driving Costco’s dog food performance
• Where Kirkland shoppers previously allocated dog food spend
• Brand and retailer switching patterns among new Kirkland buyers
• How purchase frequency and basket size differ for Kirkland shoppers

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