Chickens love tomatoes. Toss a few ripe ones and they will come running. Chickens are quite the omnivores. Their tastes range from grass to seeds to bugs to worms to field mice. But, they go nuts over ripe tomatoes and ripe fruits like berries, grapes, and melons. Give them half a watermelon and within a short time the only thing that will be left is a paper thin watermelon shell.