I have seen Iguanas eat tomatoes when fed them but not the lil ole garden lizzies. You should probably head out at midnight with a flashlight and see if you can spot the culprit, you may be surprised at what you find!!

If you can post or link to a picture of the bite that would help.

I will do that tomorrow night, when I don't have to get up early.

I found big holes in mine too on the ones close to the ground -- then I found some slugs.

Chipmunks and thirsty birds are often the culpret in my yard. Red pepper is keeping the chippies out of my flower pots - I wonder if I should sprinkle the toms.

Hmmmm - slugs, aren't those homeless snails? I've never seen any here, presumed it was too hot and dry. Do I have to go out at midnight to see them?

I was thinking slugs too. If you have none, consider yourself lucky! :)

They like to hide during the day, so nighttime is best to be able to find them in the open. Where I live, if you overturn any pot or gutter extender, you can see them in the daytime.

Let us know what you find on your midnight hunt!
Shaila

Wow, lucky you, if you don't have slugs or snails! I have an endless supply. They will come out at night, especially after a rain.
Bird netting really made a difference for me. But you said they are not beak holes. But maybe bird netting might help w/ iguanas or other animals too, but I wouldn't know for sure since we don't have iguanas here.

If I'm not mistaken, you can trap slugs/snails by burying a plastic cup in the ground up to the top and adding 1 inch or so of beer in the bottom. Obviously do it at night and hopefully even more obviously, don't waste the good beer on the bugs!