IS MY Snake Eating TOO OFTEN/Please Respond

[jaleely]

Most of you have seen the photos of my hoggies. I've never noticed them being thin, even when they've gone off food for a shed. But when they are not shedding, they are actually begging me for food. I feed them every few days.
My "hard to feed" male has now turned into a garbage can, and my "easy" to feed male has now turned into the pickiest eater I have out of all my 16 snakes *lol*

I try to feed my picky one, Copper...and if he won't take it, i try again the next day. He usually will, then. (All conditions have to be accurate! Braining...opening the skull...it has to be the perfect warm temperature. It can't be wet...and it can't hover over him, it has to be presented head on with the tongs *lol*)
Anyway, i've found that my "garbage can" eater seems to prefer fish. I've switched him from mice, to fish *shrug* i just add caclium to the small fillet. He gobbles it down. I fed him just about every other day, when he was little. He's almost full grown now, i'd say. I feed every two-three days. His photos are through my profile and you can see he's not fat!
They poop after every meal.