What might be eating the leaves of newly planted strawberry plants? We live in Zone 6 of U.S.?

Look for slugs under rock etc during the day. Most leaf eaters will come out at night. Take a flashlight after dark and look for the culprit.
What might be eating the leaves of newly planted strawberry plants? We live in Zone 6 of U.S.?
i don't know but i am using dawn dishsoap to keep critters away from my garden and it is working realy good , plus its cheap and i don't have to worry about getting sick from pestisides