My parakeet's droppings are light green and white semi solid. He has a good appetite and is drinking water with vitamins. He has a seed diet and will eat lettuce. I've tried fruits and veggies but he won't eat them. He is lethargic and seems weak. He falls occasionally when going to cup. He sleeps a lot and does not talk or come out. Please help me get him better. Any suggestions will be appreciated. This has been going on ~ one month.