I'm not sure about your location, but ants will eat holes in strawberries. I don't get a lot of damage from ants; but still I put out Torro liquid ant bait when I first start to see them. Slugs and birds are by far the worst offenders, so bird netting and slug bait take care of most of that problem, and as the season progresses slugs become less of a problem and after the birds have fledged there young, so the birds become a little less of a problem... but there is always something that wants to get your berries, JMHO.

Thankyou Mudflapper , I have the strawberrries caged off from birds and I throw insect netting overtop which of course doesn't stop ants and slugs but I guess I better find something to ward of those little buggers .