It's entirely possible that it's my chickens who are stupid. :D

Although, I must say that this year, I had some wild tomatoes come up from the seeds that dropped last year and saw the beginnings of thw's. I couldn't find any and figured I'd wait until they got big enough to see better.

So, a few days later I went out and there was no further damage and no worms... though I'm positive that the initial damage was thw's. There's just no mistaking the chomped off look of a tomato plant.

I wonder if my pets are eating them this year... or will eat them if they're smaller but not when they're bigger and full of more toxins.

Also, this year, I would dump my kitchen scraps in one spot of that very garden, so the chickens were feeding at least once a day right beside the affected plants.