Hornworms are hard to spot as everyone knows. The trick is to take a spray bottle with water in it and spray the plant where you are looking. The hornworms hate water and will begin shaking, making them easy to see.
I've got raccoons getting into my garden every night and eating my Super Italian Paste tomatoes. I have 10 diferent types of tomatoes growing but those are the only ones they eat. Forutnately I've got 60 tomato plants growing so there is enough to share.
Once you see the bandwagon, it's too late.