Hi Candace!
Yep...my wild birds eat real good also
Since I only keep one species, the Goulds get one shot at the seed and then straight to the backyard birds.
Like AC12 mentions, if you offer seed deeper than about 1/4 inch, then blowing off the top to get to new seed underneath is fine, but forcing the same seed under their nose over and over again is less than optimal.
How to cut down on seed waste - Seed Hoppers. Often takes a month or so for finches to learn to use them, but once they do you will see your seed cost drop by at least 50% compared to using those D cups that come with many cages. Your seed blend will be offered continuously in constant proportions allowing your birds the final decision.
See ya
Bill