What to feed to get the biggest fish possible ?

when should you stop feeding growth food to young guppys ?

what age do you cull at ? or do you wait for them to mature then cull ? (culling the ones you dont want to bred with i mean)

I feed mine WINNA DOG ROLL.

feed on brime shrimp and alternate with quality flake,crumbs,bloodworms etc, lots of water changes,big tank ( 3ft), seperate the fry when the female has had them (that way the small fry have a chance at getting food), and seperate males and females when you can sex them, then cull out what you dont want when they are almost fully developed (that way there is no chance of you killing out a good fish)

An earthworm flake to the parents is good