Gosh I'm so sorry to hear that. I feel so bad. I didn't mean to make you sad again.

Did you vet mention anything about Vitamin K? It is usually used for poinoning in dogs, but usually its poison that is ingested, I don't know if it would help with topical poisoning. When I worked at a vets office we never had a dog come in with topical poisoning so I dont know, but it may be a worth a shot to call your vet to see if it may work. She can you a script for it. I don't think it is avail without a script.

I know it's hard but please don't feel guilty. You didn't know. It was a mistake. It was not your fault it could of happened to anyone.