What Could Be Eating the Leaves on Our Calla Lilies

Question

I suspect snails or slugs but don’t see any trails that would evidence this.

Answer 1

It could still be slugs or snails. Setting out a pan of beer will determine it or not. It could also be rodents. These articles will help too: https://www.gardeningknowhow.com/plant-problems/pests/organic-snail-control-how-to-control-garden-snails.htm
https://www.gardeningknowhow.com/plant-problems/pests/facts-about-slugs-and-how-to-kill-garden-slugs.htm
https://www.gardeningknowhow.com/plant-problems/pests/animals/garden-mouse-control.htm