TOTW has ethoxyquin in it, a known carcinogen. I used it for over 2 years for all my dogs and cats, before I learned this, and stopped.

You will NOT find it listed in their ingredient list; they are not required to list it, because they do not add it. They buy fish from a supplier who adds it to the fish. They have admitted it is in there! They ARE following the law, so no issue there.