What's eating my plants?

I have couple of chilli plants (ghost pepper, Carolina reaper and habernero) all seem to suffer from having holes in them. Any idea what might e causing them? I am thinking of applying neem oil but is there any other option? Thanks for you suggestions.

I have couple of chilli plants (ghost pepper, Carolina reaper and habernero) all seem to suffer from having holes in them. Any idea what might e causing them? I am thinking of applying neem oil but is there any other option? Thanks for you suggestions.