Hi! I was very shocked when I learnt that all but a few very expensive farm shops/butchers who have 100% grass fed animals, feed chickens and turkeys (uk) with soya product feed. This in turn leaves traces in both the meat and eggs. I have been trying to eliminate all soya in my diet for years due to it's ill effects on the thyroid, but as I like chicken and eggs, and didn't know this intil I read an article on ethical meat, I have been consuming it for years.
Thought this was an important find to share with other fellow thyroid sufferers. Apologies if this is well known and I just missed it.
If anyone knows a brand of eggs and chicken you can buy in the supermarket that is definitely soya free, I'd appreciate you letting me know (pm if need be).