I have gotten used to throwing lots away, but I do spray. If I didn't spray I wouldn't have many good ones. Thuricide concentrate is one I have that was $6.99 at the feed store. It contains Bt bacteria that only kills caterpillars. I also have some fertilome borer, bagworm, tent cat, spray that was $12 or $13 dollars. It doesn't go far because it is 4tbs. per gallon of water to make the spray. It contains spinosad. I'll let you look those up for yourself instead of pretending I know what is safe. I have read that they are safe. If they are in the blush stage when you pick, your picking is not the cause of their small size. If you don't have any yellow leaves, you are probably in a dry climate which may be why the tomatoes are small. I have three dogs and no squirrels, live opossums or racoons but they have dug many holes in my flowers so I wouldn't recommend that solution.

you can try neem - it helps with insects and fungus and it's organic