Agama lizards are not poisonous like some snakes and therefore have no venom or toxins within their bodies. Though it may bite if threatened by predators, it is not dangerous as its teeth are very small to penetrate the skin of humans and cause much more than simple scratches. But it is still worth knowing that even friendly reptiles may carry small parasites or bacteria like salmonella, which may make dogs ill, therefore although agama lizards are not poisonous for dogs, one must be careful with their bites or any possible transmission of pathogen.