Birdmom is exactly right. And if it's not too late, washing
with only water probably did not get it all. This is one of
the few times we need to wash with other than just water. A
few drops of original version blue Dawn dishwashing liquid in a
sink of water and wash him thoroughly. Of course making sure
you don't get any in eyes, nostrils and ears and rinse
thoroughly. But for sure, get to the vet if you haven't
already. At the risk of causing panic, this could be fatal.