as the sayin goes you give a baby sweet/salty foods an thats what they will crave an refuse other food tastes!!
it will be the same with your bird, an you will be making a rod for your own back! and creating a monster as these bad foods will no doubt mess with his temperment!
ensure your bird has ONLY formula or parrot food, did you warm formula??
i would be a liar if i said i only give my nut parrot food! i do give bad foods as a treat for her, but once a week and if its a very bad food, such as a chip (fries) can't remember the last time we had them!
but nut eats her pellets, fresh fruit an veg and drinks plenty and is an adult bird
i break foods that i consider bad for nut, into sections
really bad foods are anything high in fat/salt/sugar and processed we dont have these foods often ourselves (mash potatoe is nuts fave!!! but we make ours with cream an butter!) once a month if that
bad any other none parrot foods such as cooked dinners! even though i do not add salt into my cooking, its not cooked for nut, its cooked for us to eat and although she does get a bit of dinner each night i only put things such as pasta/rice into her bowl an perhaps a touch of what ever else
treats still occasional are such things as boiled eggs (no yolk, as i know that has cholestrol an high fat) chicken bone, chicken meat, prawns (none of these are fried! or cooked with added fat)
these are only offered before nuts bed time, so throughout day she has had a normal diet
i want to grow old with my nut, and just like i want my son to grow with healthy eating habits, i set the rules an examples
also vet fees are not something i can afford easily!!