The East American toad is poisonus and is partway into kansas. This is the warning about the toad 'These glands secrete a viscous white poison that gets smeared in the mouth of any would-be predator, inflaming the mouth and throat and causing nausea, irregular heart beat, and, in extreme cases, death. Toads pose a danger to pets, which may pounce on and bite them. Humans should take care to wash their hands after handling a toad, and to avoid touching the mouth or eyes until having done so.'
It can either get pets high.. or kill them, if it was this type of toad, if it was something else your dog is most likely all right.