This is my unlicensed, professional opinion:
I feed Max [da Macaw] by syringe twice a day now, until he tells me he is no longer interested. I use a meat thermo to get the *MIXTURE* I use to 102-107*F. This is solely off my own observations of his preferences.
Now, as to the mixture itself....
I don't trust anyone in the food industry. Between flavanoids and chemical cleansing/processing of things, I prefer to feed and eat "semi-organic". What that means to me, is to go to local farmers markets (supporting my community) and getting all kinds of vegetables and whatnot. Add in a rinsed can of soup beans, and sprinkle in powdered trail mix[by my food processor]. Enclosed is a pic of a fresh batch. Max goes absolutely NUTS over this concoction. Henceforth dubbed "Birdy-crack". Feeding him in this way, which I think I am overfeeding, runs me less than $45/month. Split between the fact I will eat what he won't before it expires - the ingredients never go to waste! Economical. :-D
The image is one whole day's feed for him, total of about 16 syringes. Swear he's overeating, but he takes as much as he wants until he says he's done.