Something is eating my Jacobs Ladder

I planted 3 Jacobs Ladder plants this spring. Something seems to be eating them, one of the plants is almost gone and the other two are showing signs of being munched on.
Any ideas??? Would love some natural ideas that do not include chemicals. Thanks

Doug says that he can't "guess" from a distance. Unfortunately, there are several options - from rabbits through deer to slugs. Without more info I can't really help. You might want to research all three by doing a search (on the left hand nav bar) for them and seeing what you have to do to stop this damage.