I'd give it 2-3 times a week and also make sure that the vitamin A source is not from Beta-carotene. I read that source is not very good for them. Something else you could try, which has been successful for me, is add a couple drops of liquid bird vitamins to the water dish and it will get absorbed through the skin. It's called Vita-Sol and you can get it from Amazon if your local shop doesn't carry it!