Tomato Hornworms, they are very hungry.

Manduca sexta is the zoological name. Welcome to tomato culture. You just found out that one of our largest moth caterpillars in the continent, also likes tomatoes. Actually, just the leaves more than the fruit. If yu want to see a really fascinating moth, remove the cats from the mater plant and place in a container with horsenettle, silverleaf, ground cherry, or black nightshade leaves. The cats will quit eating soon and need a few inches of moist, but not wet soil to pupate in. Moth will emerge in about a month. Have fun! BTW, those moths are really good for pollinating night-blooming plants and normally do lay their eggs on wild plants and weeds--their normal food supply.