Hello:
I have some questions for you:
Awaiting your reply.
I recommend inducing vomiting and getting him to an ER vet tonight if possible. Give him a capful of hydrogen peroxide to induce vomiting. Do not feed him, but allow him to have water.
Decon is very toxic to dogs and can cause internal bleeding. The ER vet will be able to give him a medication to decrease the likelihood of bleeding and flush out his system.
Let me know if I can be of further assistance.
Dog Veterinarian
Doctor of Veterinary Medicine SGU, B.Sc. Animal Science Purdue University