In late March once the snow receded I discovered the canes of four well established roses
lying flat on the ground. Voles or some other underground residents devoured the entire root ball and stems of my plants. They are 100% destroyed.

I'm wondering if I should replant in the same area. The damage went unnoticed as it all went on beneath the snow line. The canes didn't fall over until the spring:)

Is there a gardeners trick against voles? Should I pour used kitty litter over the area?
I've plugged the stems into the ground and am hopefully on my way to recovering, or at least trying to recover one or two of the three varieties I've lost. Wish me luck!