40 grams in just a few days, that doesn't sound right :11: average weight for an adult CAG is between 400-650 grams, to gain up to 10% of adult body weight in just days would seem just about impossible, is whats going in comming out?
40 grams in a few days, sure does not sound correct.
Did you perhaps weigh him just after he had eaten?
Even then a change of weight by 40 grams is highly impossible, in a few days for such a young bird.
Did you perhaps change the diet, food pellets etc, anything new?