You're right Carolyn.
Though reducing the mess at least a little will be easier. Dudley's food is easy to sweep up since it's bigger, but the tiels', Joey's and the finches' seeds tend to get stuck in between the tiles. It's quite tedious.
I guess birds will make a mess no matter what they eat.
Alex used to get in the pellet bowl, and when he got out, it would fly everywhere. He's finally getting the hang of eating at the edge of it, but he still has his moments.