I sometimes have my woodwork finished by an urushi artist, that is the coating they put on wood from the sap of the poison sumac species tree. He had a big friendly labrador, and he told me that his dog got into the urushi once, ate a small bucket of it. The dogs lips got like a couple of overly inflated inner tubes, he said, and it appeared to be in rather grave distress. It made it though, but sadly died from old age earlier this year.