I'm planning new plantings for my strata building building in Vancouver. Our building is on a street lined with tall lindens, so most of the garden is very shady. I would love to use mahonia aquifolium to provide privacy for the ground floor units, but am concerned that the berries would attract vermin: We have a mice & rat problem that is only just coming under control with more aggressive trapping. (I'd really love to use vaccinium ovatum but I suspect that's out of the question.) Am I right to be concerned, or would they only attract birds (or nothing at all)?