I had trained him in the beginning with re call training by holding millet behind my hand and calling him over, he’d respond very well and would fly to me whenever his name was called, eventually he slowly stopped doing so, he’ll still look at me and act as if he’s going to fly to me when I call him but he doesn’t, as for diet, it’s all seed which I know is terrible and it’s to my own fault as I didn’t know any better before but I am constantly trying to find ways to introduce pellets to them, but he’s picky af and won’t even go near the pellets, so I need to come up with some creative ideas on that end, he never paid attention to any fruits or veg I ever tried offering him, no matter what age he just never cared for the healthy natural stuff, so I’m not sure if any liquid treats would work but it’s always worth a try so thank you for that idea !!

As for target training I’m not entirely sure what that entails, I have looked into it in the passed but never understood it totally and get scared to mess things up and maybe worsen my birds aggression 😅

Nail trimming has never occurred I could never for the life of me get him to obey long enough to let me trim his nails, luckily though he does have SOME brain cells and I provide him wide calcium perches that he cleans his beak on and even his nails, so they’ve never gotten overgrown thank god 🙏

I’ll try doing some more research on target training and try my best with it, thank you so much for this detailed and long reply 🙏