I've just weighed Wooser and Princess. They both have the same parents, although Princess comes from the clutch after Wooser. Wooser weighs 86 grams and Princess 91. Should I be worried? It seems like quite a large difference in weight. The only worry I have about Woosie, is that when I come home Princess wakes up and comes out to greet me straight away, Woosie will quite often sleep for another half an hour or so.
I dont know how much this will help but i found this for you lin:-
Expected Weight Gains of Hand-Raised Cockatiel Chicks
Age Weight (In Grams) 0-2 days 4-6 3-6 days 5-12 1-2 weeks 12-45 2-3 weeks 45-72 3-4 weeks 72-108 4-5 weeks 80-120 5-6 weeks 80-90 6-7 weeks 80-95 7 weeks - Adult 90-110
Please note that weight gain becomes steady until the 4-5 week stage, which is when fledging normally begins. Baby cockatiels go on a "diet" then, eating less at each feeding; they appear to only be interested in flying. Be persistent, and offer them different types of food to pick at in their cage during this time frame. They should not lose more than 10% of their top body weight during fledging.
According to this chart, Wooser does seem a little under weight but how accurate this chart is i dont know. Its quoted from a book that is about 20 years old, so as i said it might not be very helpful. Maybe someone on Smiley's forum can shed more light on it? Sorry i couldnt be more help
*edit - i typed that into a lovely table layout and its squashed it all up *
I might weigh her in a couple of days, and see if she's dropped any weight. She's definately eating, her poops look fine, so maybe I am just being paranoid. If she drops any weight, I will race her off to the avian vet I am slowly, but surely, making a very rich man #cheesy#