My daughter was at a routine checkup for her one year old, and the pediatrician asked what baby eats. Daughter rattled off a list of things including peanut butter. The pediatrician went nuts. lol Daughter shrugged her off and said baby had no issues. Grands were visiting here recently, and I have to say those children eat anything and everything except fish. They have been brainwashed by both of their parents to not eat fish. lol But no issues with peanut butter.
Take them fishing and see how fast that changes.