(My guess is that I have both Eastern and star-nosed moles) I would like to use a castor-oil spray, but I have robins, including a sitting mother, and I don't want to do anything which might make my yard less attractive to them. (I am contemplating trying to time the castor-oil application between fledging and the next set of eggs; but again, I want my yard to be welcoming to the robins.) What are your thoughts?