If someone near you spots a dog eating something hazardous, quickly assess whether or not he/she has swallowed enough of the substance to harm him/her. If you think your dog ate something hazardous, and you can see it in his/her mouth (e.g., a small hook), remove the object with gloves on if possible. Call your veterinarian immediately to ask for advice regarding how much of the substance might have been ingested and what to do.