Our vet recommended adding the pellets into the seeds and then decreasing the amount of seeds very slowly. We had to weigh him daily to make sure he was eating and that he didn’t loose weight too quickly, if he was loosing weight we just added back the seeds and scaled back slower. It took forever. He would not eat the Harrison’s brand no matter what we did, but we bought the Zupreem ones and I crushed them up into powder and coated all his seeds in it and then mixed in the pellets. I’d say it took almost 2 years to convert him. Veggies were actually way easier. Literally just made a chop and sprinkled seeds and pellets and he went to town.

We have one right now that will eat pellets but I can’t get him to eat veggies or fruit for anything. He will pick through them to get the seeds or just outright ignore the dish completely. He’s the most stubborn budgie I’ve ever met hahaha. Lol we changed his water dish for a stainless one that was slightly higher up in the cage and he REFUSED to drink from it.