Beginner Gardening: Help! Who's eating our fern and Hosta?, 1 by goofybulb

goofybulb wrote:
Hello again, my friends! I need your help.

The pics below are from our garden back home, that now my Dad and Sister tend. Something chomps on our beautiful fern, and the old Hostas there, and I have no idea what. I've never heard of anything eating ferns until now. On the left side in this pic you can see the last normal fern leaf, for comparison.
My sister tells me there is no insect or animal to be seen, either on the leaves or on the ground.

Please take a look and help me, I really want to save these plants, as they were planted by my dear Grandma and I could not imagine our home without them!
Alexandra