PetAg's CatSlim Jerky Snacks are a line of weight management treats that are all natural and free of preservatives and gluten, the company reports. The Chix & Cheese variety contains chicken, brown rice flour, oat flour, non-fat parmesan cheese, sea salt, soy sauce powder, guar gum, ground basil and ground black pepper. The Southern Catfish treats are made from catfish, barley flour, brown rice flour, oat flour, sea salt, guar gum, parsley powder and ground black pepper. Both types come in 2-oz. packaging.