Why is my 16 year old Red-bellied suddening starting to regurgitate a few times now over several days? Very little is regurgitated, a few food particles and a little fluid over several minutes. He gets listless during after this and does not act well for some hours. We think his diet is way to rich in seeds and now have him on a strict diet of only 10% seeds and the rest soft foods and pellets. He has always had veggies and fruit, but his main diet was a seed mix based on safflower sees. Now we started him on Harrison's chunky pellets as his basic food plus soft foods he has had before. Loves grapes, banana, apple, frozen veggie mix thawed out, he likes peas and corn especially. Any experience with this and any suggestion why this is happening and how serious it might be? Thank you!