Hops
Source: http://draftmag.com
One of the more famous ingredients of beer, hops can be poisonous when ingested, with dried hops and cones being the most dangerous. The compounds in these hops, whether fresh, dried, or cooked, can result to a malignant hyperthermia, or a rapid rise in body temperature, which can be fatal. Other possible symptoms are panting and seizures, so keep your dogs away from these vines, in case you’re into brewing beer of your own.