I am having a problem with mice eating the bark off at the root level of my junipers. It looks like it is epidemic in the area. I have used posion set out in little containers with access holes for mice only. I am not winning.

While mice can eat the bark at anytime of the year, winter & early spring are the most common times for this to occur. Mouse poison in small containers is often effective, but if not, spraying the surface with Ropel, (a bitter tasting animal repellant, that will not harm the plants when applied to label directions) also works. Applying a barrier, either plastic strips or wire mesh, would probably be the last suggestion we could offer.