Rooster Feed Help

[Knight1992]

I am currently feeding my rooster Gamebird/Showbird with 24% Protein! Plus Rooster Booster Liquid Vitamin b12 plus Vitamin k. and he eats broccoli.what else can i feed him to get him to gain alot of weight quick like

 

[speckledhen]

You can't make them gain weight fast. In my experience, it does take some time. Did something happen to him?