If your betta is spitting out his pellets, it could be for a number of reasons. Perhaps he is not getting enough nutrition from his pellets, or he may be trying to tell you that he is bored with his food. It could also be that your betta is sick, and the pellets are causing him discomfort. If your betta is generally healthy and happy but suddenly starts spitting out his pellets, it's best to consult a veterinarian to rule out any underlying health problems.