Hydrogen peroxide. For a dog that has ingested a poisonous substance where vomiting will be the solution to expel the toxin, put 1 tsp' [3%] HP in the mouth. Take the dog OUTSIDE and throw a pinch of salt in its mouth. The entire contents of the stomach will be immediately expelled.
re: curing poisioning and stomach toxins: I had a full size male doberman pinscher, was poisoned with antifreeze. Tried to take him to the vet, and would not take him said there was nothing they could do. Well being he was my baby i didn't give up. Someone told me to cook bacon, take the grease, a raw egg, and a lemon lime soda, mix it together and force him to eat it, granted he threw up alot, it was bright neon green, but i kept feeding it to him until it was no longer green, then feed him pedialight for dehydration, he lived and is fine today, it seems to force any toxin that is in their system out.