Squirrels, Oh I know......last year they ate all of my sunflower seeds before they sprouted and they ate every last one of my nectarines from a tree I planted last year
Today, I go out to check on ma babies, and there was a squirrel digging around my eb's. I found a website for pesky critters, it's called shake-away, totally humane. I just bought some, will let you know how it works. http://www.critter-repellent.com/
If you find something better, please share with the rest of us.