The best available information I can unearth reveals that a small cat's "perfect" nutrition package - a mouse - contains a very high amount of taurine relative to other meats - approximately 2.4 mg/gram. The good news is that taurine is present in most raw meat muscle meat, but it is abundant in the heart and brain. Chicken hearts are a fantastic source of taurine if you're making cat food.
(FYI, I procure chicken hearts in bulk from a really great place in PA called Hare Today Gone Tomorrow - they ship the hearts in 2-lb packages, frozen, right to the door. The packages always arrive in great shape and I use a small chest freezer to store the packages until food-making day.)
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