[Monica]

He ought to be 12 weeks old now? You've had him since he was about 8 weeks old? I'm sorry but just because a bird hasn't eaten for two days doesn't make it weaned! And birds in a new home will regress.

You need to go out and buy a digital gram scale (Walmart or Target, for example) to keep track of your quakers weight... Does your quaker beg? You might want to consider going out and buying a small bag of handfeeding formula, mixing some up hot (about 105° F), and seeing if he'll eat some off a spoon or syringe. If so, you may want to give him at least one feeding a day until his weight gets back up. You may also want to make some baby food (i.e. some cooked mashed sweet potatoes, maybe add in some steamed carrots, a little peanut butter) fed warm at night right before bed... or you could even buy some Gerber Baby food, no zinc, various types of veggies, and feed that warm, as well.

Of course, loosing a drastic amount of weight may be a sign of a health problem which may need to be seen by an avian vet, and could be a sign of something serious....

Although birds who exercise more may also loose weight.