My dwarf Griffen eats everything I feed him within minutes.  When I give him a fresh pile of hay each day it only lasts about ten minutes.  A carrot is gone as fast as he can eat it, he eats his pellets/breakfast right away  and all at once.  And he is always begging for treats.  I feed him exactly what the vet said to.  Is he actually still hungry or does he just like to eat?  I can't help but notice that breakfast takes my other bun all day to eat.

I would suggest leaving a permanent source of hay that he can munch on at his own leisure whenever he wants to. There's a good deal of discussion about various methods of hay dispensing in the habitats and toys section of the forum...I'm sure you can find one that works for you and Griffen .   Besides being an integral part of bunny diets, it gives him something healthy and non-fattening to eat if he's hungry at any time.

Griffen sounds like Peppy...she wolfs down everything and anything that I give her, and always wants more. However, Remi is a little more finicky...sometimes his night-time veggies are still there in the morning. I guess just like people, some buns love to eat more than others

A carrot is gone as fast as he can eat it, he eats his pellets/breakfast right away and all at once. And he is always begging for treats.

agreeing with the others....I think when your vet said to give a fresh pile of hay each day....they thought that pile would last all day, LOL. Some of those store bought hay racks are simply too small. If you work outside the house and are gone 9 hours a day....there is no way a "full rack" will last that long. Snoop around for lots of hay rack ideas!! It's kinda fun to be a little creative and build your own hay rack.

Oliver is the same way...eating everything in sight in one large gulp. He has toned down a bit with the hay, but the greens and the 2 tablespoons of pellets he gets a day are gone before I know it. He's a little eating machine with no off switch. Just because he WILL eat additional pellets....doesn't mean he should be eating them. I think a hefty eater just means they are healthy and happy...but it is important not to over feed. I've heard many times...Just because a bunny gives you the impression that they are STARVING TO DEATH   ......they're not.

 they are just greedy little eaters!

I use one of those long tissue boxes as a hay dispenser (be careful, the bunny may want to eat the box, but mine hasn't so far.) I fill it nearly every day (and I mean CRAMMED full) and he also gets a giant handful in 2 litterboxes when I clean them every other day. This is in addition to a cereal bowl of greens and veggies twice a day which he inhales. They really seem to gobble up everything in front of them. I would serve much more hay so it's always available, they can't overeat that.

It really is amazing how much they eat in proportion to their body size, but hay is just dried grass and low in calories.