OK I have been busy, but I see you all are looking for some sort of treat for chickens that has high protein, like kelp and fish meal ?
I used to buy 50# sacks of TROUT CHOW , had to order it from my Purina feed store (in California) for our koi.
It comes in a powder for fry, (that is baby koi) and has graduated sizes all the way up to a little bigger than a pea.
We kept it cool, as it has oils in it, and if it is kept too long or in heat it can rancid.
TROUT CHOW. Do not buy koi food, it is totally blown out of proportion in price.
I will see if I can find a link.