We back onto fields, and following this years harvest we have been inundated with voles. This the first year they've been a problem, and when out in the garden found they'd munched their way through half my (in flower) sedums, a patch of osteospermum, and looks like there are attempts at the salvias too.
What to do? No cats (might explain population explosion, last few years neighbours had cats, moved away), dog is indifferent but can't lay poison because of him, and im not a fan of this method anyway. I have covered traps down and currently getting up to 4 a night. Is there any other way? Would used (yuck) cat litter work? Any spray deterrent that won't harm the dog or my resident hedgehog family?