It would really depend on how much was in there. It takes an extremely small amount of thyroid hormone to mess you up and it would take even less for dogs. Cows have bigger thyroid glands. For myself, I wouldn’t worry about an occasional meal with too much thyroid in it, but I certainly wouldn’t want it to be a regular part of the diet. My endocrinologist says it takes a human about 3 months to get back to normal after taking too much or too little thyroid, I don’t know if the timing is the same for dogs, but I’m pretty sure that eating thyroid every three days, when you don’t need any at all, would be too much. I have fed my dogs gullet twice in 2 years.
