Housing Costco could be target of lawsuit over grain-free dog food by Alexis Weisend The Seattle Times June 27, 2026 by Alexis Weisend The Seattle Times June 27, 2026 A proposed class-action lawsuit claims that Costco falsely advertised its Kirkland Signature Nature’s Domain grain-free dog food as healthy while hiding that it could cause heart disease. 0 FacebookTwitterPinterestEmail