Pets and their expressions are priceless, so for today here is the story of one such chihuahua, whose always angry. Eviatar Ozeri, an Israeli Tik-Toker, once started to upload short videos of his dog, Niki on the Internet. The videos started to go viral like crazy because of Niki’s expressions! The dog is officially known as ‘The Angry Instagram Dog’, here are some of his pictures: