I love bird feeding

i bought a young cag who was still being handfed by his breeder. he is 3 months old and on 3 feedings. the bastard breeder told me he has a family emergency and was leaving the state inmediately, so i either took my bird and learned to handfeed or waited till he settled and he would return half my money. needless to say i took my baby home and im handfeeding him as i was instructed, when he is full he wipes his beak, refuses food and flies away to his cage(which im quite impressed by) or sometimes i put him back, but not too long has passed and he cries for us, is he still hungry or what is it? i also give him fuits, veggies, cheerios and millet spray which he squashes and sort of eats, but why does he still cry? it breaks my heart to hear him and i never refuse him food. we all kiss and play with him, what should i do for him? the breeder actually did leave, but i dont want to see my baby cry. thanks for any help.
he hasnt lost weight, he is not lethargic he actually will fly to us if in the mood. his crop is full also, but how do i cut the middle feeding? wont he cry more? i was told not to refuse him food, so how do i wean him? im not frustrated but afraid for him. he seems well, i have had him 1 week and so far so good. he is sweet and friendly even to the kids, our only issue is that he likes climbing heads-lol- he loves to be on top of his cage, but it just scares me when he cries so much. my hats off to all you handfeeders, it certainly takes ba11s to do this.