Native earwigs are beneficial, the introduced European earwig not so much. It can really do a number on flowers, see the earwig entry in the AHS daylily dictionary:

http://www.daylilies.org/ahs_d...

I'd wondered about them for Cat's damage but usually there is earwig poop in the flowers that gives them away as the culprit, like this:

I think mine is slugs. I did see some slime and found a few out the other evening when I went out and looked.