How does the Mexican axolotl obtain nutrients?

Once every few days, though naturally a bottom feeder an axie should be taught to hand-feed as this can prevent swallowing of gravel (though you should really makes sure it can't fit in his mouth anyway) and it should be cut into cubes less than a centimetre. He eats quickly and once he grips hold of his dinner, he won't let go! He swallows his food whole so should not be fed anything bigger than his mouth.