I sent the children out to pick the tomatoes from our garden. They brought a ton in but I swear most have little holes on the bottom. They look like little worm holes. I don't see worms but what else can it be?
I believe you're talking about tomato fruitworms. They're incredibly common, unfortunately. It's really a caterpillar that will turn into a moth. They lay their eggs on the leaves, and once they hatch, the larva burrows on in. You can use neem oil as an organic method to try and control the pests.