this spring we thought our chipmunk came back, so we put out a trap. we caught 6 mice and thought we had them all. today we saw another mouse in our front flower bed (raised using bricks that circles our front porch and sidewalk). we think that they are eating our hostas because only half of them came in this year. how can we get rid of them and keep them away without harming our dogs, who like to sniff around the garden while we work? 