Marcia to Ethan
Not all are. And this is a TOAD. Their "warts" are actually glands that produce a foul liquid when they're handled or otherwise need to be on the defense. In the Northern part of the U.S., this liquid is not toxic to large animals or people. A dog will foam at the mouth, and likely not pick up another toad again. If you rub your eyes without washing the liquid off, you'll have REALLY STINGING EYES - but no long-term injury. The farther South you go in the U.S. will expose you to several species of Toads whose glandular defensive liquid IS TOXIC TO DOGS, CATS AND HUMANS! People survive, but cats and small dogs . . . get very ill and sometimes die. Take them to the Vet ASAP!
