Answer: Small holes can be caused by many different things such as birds looking for worms or insects, skunks digging for the same (at night), or possibly ground wasps or bees or some sort of beetle being active in the heat of day when the soil is warmer. None of these would require treatment in a shrub border. Cut worms would not harm shrubs, either. I'm sorry I can't be more specific for you but unless you see damage happening to your plants, it shouldn't be cause for concern.
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