depends on what you feed them.ours get walked twice a day fed breakfast then later in the afternoon they are given their main meal.they only get a gallop up hill once a week unless they are racing.
choc labs are a queer dog if you ask me.i know a couple of them and i would not trust them.
we used to have a greyhound that would bite you if it seen any small animal and it could not get to it.had to walk it out in a box muzzle.