In my experience with rabbits (used to have waaaaaay too many hungry rabbits when I lived in the midwest!), they did eat the semps some in the winter and early spring until other more delectable things started to grow. The semps always recovered fine--never lost any completely to the varmints.
Of course you can grow them in a container-- and if/when the colony outgrows the surface space of the container, you can make more containers of them
Does anyone know if Dudleya cymosa is more cold tolerant?
I'm intending to try one this year, because I saw some sources say that it is...