Any other symptoms to look for or antedote?
If you live in FL or any area with poisonous toads, contact a vet, ASAP. otherwise, just be glad, that you don't have that issue. Even non-poisonous toads will taste bad & make dogs foam at the mouth (as an escape mechanism).
I would take him to the vet if he was foaming,some toads are poisonous,and he could die if it was one.
Call your vet!