OK, peeling an apple or cooking the carrots does nothing for the chemicals (the carrot is a root so they are absorbed into it and the apple peel is so thin that they go right through it into the skin). Personally, I don't feed them everything organic but the 12 worst ones I always do and any other stuff that I can get at a reasonable price so, for example, all the greens are always organic even though all of them don't appear on the list (well, except the broccoli which is actually on the 12 safest list).
The medicine you referred to is an antibiotic. An old fashioned one that has fallen into disuse for birds because of the better ones they have come up with lately and also because it has more side-effects than the new ones but an antibiotic nonetheless. See here:
https://www.healthwarehouse.com/sulfame ... ctrim.html
Yes, all handfed birds love to eat from a syringe. It's actually one of the ways one can tell if a wild-caught was handfed or not. And, although I think that Wolf's idea of giving them something in a syringe every now and then is great, I don't find it necessary because, even when they don't get it all the time, they seem to always remember and, as soon as they see it, they want it.
Now, eating (or trying to eat) its own poop is a sign of malnutrition so, please, give those birds a good vitamin/mineral supplement because they obviously need it badly.





