The Winnie Lou Bison Liver Bits Freeze-Dried Cat Treats are a su-purr tasty way to reward your furbaby. These single-ingredient treats are made of grass-fed bison liver, so they’re paw-some for kitties with food sensitivities. The bison is full of iron, copper, and zinc to promote your best friend’s health. It’s a high-quality protein that’s free of bad stuff like added salt, sugar, glycerin, or preservatives.