chicken coop

I have four tomato plants growing awesomely. Two of them had tomatoes the size of my fist, still green. Today I come home from work and there is only one green tomato left. Humans? Critters? Whatever it was left no residue.
Upon closer examination, I found a half eaten tomato under some strawberry plants…guess I’m going to have to get some chicken coop wire or something. Thanks for the thoughtful answers.