The modern world is home to many chemicals, airborne substances, drugs, and plants that are poisonous to dogs. This article links to several everyday treatments guides for exposure to some of these common and dangerous substances.
Some poisons are more obvious than others. Consider chemicals, paint, or tar on the skin, for example. Others are more insidious, from ingested plant material and drugs to surreptitiously consumed chemicals and inhaled substances.
Any sign of discomfort, agitation or pain must be investigated. Disorientation, vomiting, restlessness, staggering, depression, convulsions, lethargy, loss of appetite, twitching, dilated pupils, ulcers, diarrhea, heart palpitations, and coma can all be caused by various poisons.
Those toxins for which immediate care should be sought include the following (click on the terms to open the guides):
Call the Pet Poison Helpline (1-855-213-6680) or your veterinarian immediately upon ingestion or exposure to a known or possible toxin. Moreover, do not induce vomiting or offer any antidotes without the advice of a veterinarian, toxicologist, or poison control specialist.

my mother in law feeds her dog half of everything she eats. ice cream,peanut butter,chocolate,bagels you name it and he gets it. she knows chocolate is bad for him so she only gives him a small amount. i know grapes are harmfuland onions and garlic what else should i let her know not to feed him. he is a heavy set pug
tell her if she loves her dog why would she poison him . If you have to be firm or mean to save this pugs life then do so .