Things that make yukkuri suffer by interacting with it (either eating, drinking or simply contact). Usually the common symptoms are vomiting and diarrhea. They may also shout "it's poison!" or "this is poison!" when interacting with said substance.
Note that this is not limited to "real" poison (insecticide, pesticide, etc...) but also the things that are poisonous for yukkuri (salt, capsaicin, coffee, carbonated drinks, etc...).
The lethality of poison varies by the type of poison, the dosage, the victim's species and whether the victim is an adult or a koyukkuri, but in general most poisons are lethal. "Real poison" like pesticide are generally instant death while smaller doses of poisonous food (e.g. salty food) will usually cause the yukkuri to vomit and shit out diarrhea, killing them with paste loss after a brief suffering.
Some yukkuri species may be immune to certain poisons, for example Meilings are immune to capsaicin (and in fact loves spicy food).
