18. Mushrooms
Dogs love to sniff. They sniff every weird spot in the yard, the park, and the woods. Sometimes they eat what they find. Wild mushrooms are a serious risk.
Most are harmless, but some — like the Death Cap and Destroying Angel — can cause liver failure and death within days. Even experts struggle to identify mushrooms in the wild. Smart rule: treat every wild mushroom as dangerous. If your dog eats one, photo or sample it (use a plastic bag) and head to the vet. The next one has a twist most people get wrong.