Little critters love tomatoes! There are a few things you could try organically; I carry a line of Folier Feed with Garlic that is an effective deterrent for small mammals and does not affect the taste of your tomatoes; you could put some chili pepper around the outside of the barrel to deter small animals such as rabbits. If you have a wire barrell around the tomatoes to keep them up while growing, get some chicken wire and put it around and over the top of the plant. Not attractive, I know, but effective. The mosts effective deterrent can be identified if you are able to tell what is eating your tomatoes. Good luck Nancy!
Makes me hungry for a BLT sandwich. We have one tomato plant growing a half-wine barrel planter. We've had trouble keeping "freeloaders" out. We're not sure if it is mammal or fowl, but some critter is eating all our harvest. Any suggestions?