Very good answer jvision. I don't know if it works but I read an article somewhere a few years ago where the author claimed success. He said he would catch the runts and freeze dry them then grind them up, add a few other ingredients (don't remember what he added) then pelletized the results and fed it to the remaining Tilapia.

I can just imagine the conversations between the survivors while eating the concoction he created.

"HUmmmmm, hey Bubba have you notice there is something weird about the taste of our new food.

That last bite I just took tasted a lot like "BOB".

You remember Bob, he was small and always getting in the way when we were eating.

I say that because I nipped Bob's tail once before he mysteriously came up missing and I could swear what I just ate tasted just like Bob.

Some reseach on that point of the subject could lend itself to a solution for you.