The latest pests to invade my wheatgrass are pigeons!!! I live in Taiwan, and there are tame pigeons flying all over the place. They have discovered my wheatgrass balcony, and I woke up yesterday morning, set up my juicer, and found a pigeon nesting right on my grass! There was pigeon-poo all over the place too. Since you can't get rid of them, I guess I am going to have to get a little net and put it over my grass. Now I have to go 10 days without my juice until my next tray is ready! Bummer.