Forgot to mention on the left side is bird droppings lol

Well first, you have to ID the pest before you can know if any treatment is needed or what to use so you are going to have to do some investigating. ;)

Holes in leaves are common and often of no real threat to your plants so I wouldn't worry about it too much. This damage could be caused by several different things - slugs, loopers, grasshoppers, black blister beetles, or CP beetles but it isn't too bad yet.

You can check at night with a flashlight to see if you can find the slugs and if so there are several pellet products you can sprinkle around to kill them - Slugggo, Slug Away, etc.

Colorado Potato Beetles or Blister Beetles are the only real serious threats to potatoes (see photos in link below) so if you discover them some treatment will be needed. Which one you use depends on if you want an organic or a chemical control.

Dave

Here is a link that might be useful: Common Potato Pests

Damage does not look typical for potato beatles nor bad enough to hurt the plants. I'd just keep an eye on them, look for the pest and not be concerned unless it gets much worse.