Hmmm, might work with the Magpies, supposed to work with anything that pecks and eats the eggs. But, knowing Magpies, and that they love to dumpster dive, they might enjoy the mustard! 
Wow, that is early, or late to have chicks, folks are looking though, I put an ad on CL, and have had more people interested than I did all summer!

Wow, that is early, or late to have chicks, folks are looking though, I put an ad on CL, and have had more people interested than I did all summer!