I had just filled the bird feeder...and couldn't figure out why the seed was disappearing so fast...until...I looked out the kitchen window and found the answer.
Naughty rooster!! See him the in the middle of this photo chomping away on my bird seed?
Chickens apparently have a keen ability to sniff out fresh seed.
I have since relocated the bird feeder to a location the rooster (or the guinea hens) can't steal the seed from. Hah, always having to "out maneuver" the chickens. They sure do keep me on my toes.