All the other plants in this bed look fine. Weird. These are my first Shastas. Are they typically prone to pests?
I've found that animals rarely read what they're supposed to eat from the garden. I planted a garden based mainly on what the rabbits wouldn't eat. Seems I've actually planted the best salad bar in town.If you scroll down here, there are different descriptions of the pest problems and how to get rid of them: http://www.backyardgardener.com/plantname/pd_c4ba.html
I saw that deer don't like them, so that's one thing to rule out.