Quoted:
The little rats are cutting into my yield.
Short of hiding in the bushes with your kit and AR, what do you all do?
Some thoughts...
If it is actually birds, netting is about the only viable way if you work outside the home, or if you want to get anything else done other than sit in the yard and watch for birds.
Bird netting gets a lot of songbirds who are there for the BUGS, though, too. They get caught in it and die.
If you drape your tomatoes with the netting, you should check it frequently. That way you can let the small birds go.
I agree that you do need to identify what is damaging the fruit. Make sure you either a) see the birds doing it, not just flying in and out of the garden (they could be after bugs) or b) ID the critter from the damage it has done.