My parakeet, Zazu, was very quiet when my mom uncovered him this morning. He has been sitting in his cage, doesn't chirp much and is puffed up. He has stuff dried on his face, it kind of looks like chewed up food (he eats high potency pellets from Harrison's bird food). I let him out of his cage to see if he would fly around at all and now he's a bit acting more like himself. He's eating and drinking but is still all puffy. Do you think he could be getting ready to molt, or is he sick?