whats eating my pansies?

Hi everyone,
My SO and I planted pansies in a half whiskey barrel about a month ago. We also planted hollyhocks behind the barrel and some glad bulbs with the pansies. We planted othert stuff around the yard but something seems to be eating the pansy flowers, some of the green and chewing on the glad foilage and hollyhocks. Its only in that area and no where else and we can't find any evidence of any insects or parasites. Any ideas?
Thanks,
Gloria