If poisoning is the cause of the diarrhea, you may need to take action at home before taking the dog for medical attention
. In such cases, a home poison response kit can be handy. The most important components will be a fresh bottle of 3% hydrogen peroxide solution, to be administered orally, and some sort of syringe with which to administer the peroxide; a clean turkey baster will work fine for this duty. The hydrogen peroxide is an effective agent for inducing vomiting in the dog, to more quickly and easily clear the toxin from his system. Do not induce vomiting unless directed by a veterinarian or poisoning expert, however, as it can, in some cases, do more harm than good.