Are there any poisonous toads in pennsylvania?

The reason I ask is because my dog just went to eat one [I pulled him back] and the toad was still laying on the ground and looked unharmed but, after i think my dog had a taste of it or something b/c right after he started drooling and spitting everywhere. Should i be concerned that the toad was poisonous [in PA to the best of my knowledge there are no poisonous toads]. I gave my dog a treat in case it was just a bad taste and he has stopped the drooling and spitting now. should i be concerned?