I used to buy Kirklands catfood from costco (that's why I got the membership
) but by about my third bag, not one of my five cats would even touch it
So I put it in the backyard for the wildlife, and even they wouldn't touch it
That was enough for me to stop buying it.
I switched to Petsmarts brand "Authority" and all my cats are doing great! Even my 18 year old guy "Lucky"has been doing amazing on it.