So I brought in an owner surrender cockatiel from my place of employment. He was sitting outside the door with a note attached stating that the owner had recently become homeless and her birds deserved better. He appears to be clean and disease free but he is currently in quarantine just incase. I did a slow switch from the fatty generic all seeds blend that were in his cage to Zupreem All Natural. I'm worried because I cannot for the life of me get him to eat fresh vegetables. I even attempted to mix a few berries in there in hopes it would entice him to eat it but he will only eat his pellets. He has an appointment in a few days to get a full panel ran to get an all over internal idea of where his health stands but due to COVID it is going to be a drop off so most of the communication with the vet will be limited. Any suggestions?