Those very even holes are caused by a bee....I think it's a leaf cutter bee...

Here is a link that might be useful: leaf cutter

I'm sure you have slugs. I am in Maryland and the slugs are very bad this year with all of the rain we have been having. I thought the holes were too small to be slugs until I went out with a flashlight last week at midnight and found tiny, 1/4 inch white, baby slugs munching away!

I am trying a product with zinc oxide right now since it is supposed to be safe around pets and I have a dog. There are other suggestions and remedies out there. Good luck!

Chris it seems you are correct. I just went outside between 3 hostas I removed 20 slugs. I have cats so I may end up using zinc oxide based on your recomendation.

Thanks
Peanut

Peanut, I use the zinc oxide as well, and it seems to work. I also give any I see a quick squirt with 10% ammonia solution. After a rain, they are easy to find.

When I read your subject line, this is what I thought you meant:

Here is a link that might be useful: Hosta Recipe