I have been battling chipmunks in one of my beds all season. In the early spring they chopped down 3 or 4 stems. Then it stopped but this week they have been having a field day again. They are only interested in one bed the one that is up against the foundation. I was thinking of moving all the lilies to a different bed. When would be the best time to do this? Can I do it as soon as they stop flowering?