"Jim Carlock" wrote in
:

I can't imagine where the flower heads went. There's no
trail left on the ground, the petals had fallen off so they
weren't that pretty.

There were no seeds on it... in fact it was hit taken over
by aphids and the leaf stems kinda turned brown and started
dying. What would steal the flower heads with no seeds?

Is there some kind of animal that would do such a thing?

yup. squirrels.
lee