Answer: Hostas can sometimes be attacked by slugs, these work at night and leave chewed holes and a shiny trail. If you see the tell-tale trails, you can control these using a bait containing iron phosphate.
Other animals such as deer or woodchucks may eat hostas, they can gnaw the plant down to stubs. These can be repelled using a spray or powder repellent labeled for the appropriate animal, or can be fenced out of the garden. I hope this helps.
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