Bugs eating leaves like crazy!

First off, im a first time outdoor grower, ive had a few successful harvests indoors, but never even tried outside. But just as stated in the title, some sort of bug is eating my leaves, sorry for no pictures, but i was just wondering, does anyone know what bug is doing this, and how can I prevent it? The holes are rounded and usually only on the edges of my leaves, i have caught a few grasshoppers, and Daddy long leg like spiders on my plant sometimes but not eating the leaves.
Also, the bugs only seem to be liking my indica's but not my sativa's anyone know why?

P.S. The plants don't seem to be harmed by this at all.

Bump!!!!!!(#$&_)#*($&)#*$&

Neem Oil works as an insecticide and fungicide

Or there is Spinosad that is only an insecticide

Sounds like catapillars.. They usually cling side of leaves while munching, so it would not be anywhere but the outside of the leaves.

Thanks guys ill pick up some neem oil

Don't waste your time with the neem oil shit it sounds to me like you have a slug and snail problem, go to the local package store buy a 6 pack of the cheapest beer and then poor a few half full cups and hide them around but not next to your plants There is something in the beer the bugs slugs and snails are attracted to... They crawl into the cup drink the beer get drunk fall in drown and die... Problem solved no more bugs . After the plants about 4-5 ft tall the bugs start to leave it alone but I contInue putting out beer it's like $4 for a 6 pack and works like a charm

Oh yeah and the above only needs to be repeated once every week and a half to two weeks Depeding on how much rain you get, since the rain delutes the beer