Attempting to switch my stubborn budgies to pellets

Hi! So after my budgie Dib was diagnosed with fatty liver disease, the vet recommended trying to get all of my birds on a pelleted diet. Today is day 1 of introducing my birdies to pellets, I'm trying the method of crushing them up into dust and sprinkling it on wet seeds and eventually increasing it to full, dry pellets. So far, doing this has made the birds seem somewhat disinterested in their food which worries me. I'm trying to also weigh them everyday as much as I can (they can be a little skittish around the gram weight) Does anyone have any success stories for getting older, more stubborn budgies on a pelleted diet? All my babies are 7 years old and have mostly only had seeds and a few different fruits/veggies in their lives, so it feels nearly impossible to get them on the better diet right now 😓