YSK: the artificial sweetener Xylitol, found in many common household items/food like toothpaste and even peanut butter, is extremely toxic to dogs. If your dog ingests even a small amount, they can die.
from /r/YouShouldKnow
YSK：人工甜味剂木糖醇存在于许多常见的家用物品/食品中，如牙膏甚至花生酱，对狗来说是非常有毒的。如果你的狗摄入了哪怕是少量的木糖醇，它们就会死亡。