I recently switched my six month old cockatiel, Cthulu, on to an all pellet diet, as per 2 vets recommendation. Today marks the end of a ten day weening from seed to harrisons super fine pellets, with fresh veggies and bird bread to help the transition. He was hyper all day, but when I switched the food to 100% pellets, some veggies, and bird bread, he didn't touch it. I left, and when I came back a while later, he hadn't touched it. Now he has very watery poop and is ruffled and lethargic. I'm not sure if this means he hasn't taken to the diet, or if it means he may be sick.