Lynn, I'll have to check on that when we get a thaw and things start to grow. Minor snow cover at the moment.
Janice, Are you sure you weren't having a triffid problem? The young ones can masquerade as semps and relatives and like all youngsters, including humans, have the ability to move quickly when you are not looking. The height of the pots can sometimes be an obstacle and slow them down, which would explain the decline in losses.