I have 2 hatch-lings and so I feed them pellets every day. I have noticed lately, for the past week or so, they will pop like 2 or 3 pellets in their mouth and spit them back out. The pellets go in brown and come out white, so its like they are only eating the outside and spit out the inside. When' they're done, there is a small pile of little white dots at the bottom that neither will touch. Is this normal?
Also, should I be feeding them in separate tanks? I'm afraid one is eating most of the food because he starts eating right away and the other is busy trying to hide before eating.

