As a BS-Chem, I am curious as to your claim regarding:
1. Lead-based dog food; and,
2. Mercury-based fish
I do believe that you do not understand the concept of “based”. In your use you consider that both Hg and Pb are the ^foundation^ of the feed being served.
To consider John McEnroe...”YOU CANNOT BE SERIOUS!”
There are two cans of tuna in front of you and you are hungry. One can says packed in Baltimore the other says China. Which can will you choose.