Dogs act jealously even when they don't see their rival

Dogs are one of humanity's most-beloved animal companions. They share our homes and seem to reciprocate our affections. But could this emotional bond extend into feelings of jealousy? To help answer that question, a team of researchers gauged the reactions of a group of dogs when their owners appeared to shower attention on a perceived rival.

from Latest Science News -- ScienceDaily https://www.sciencedaily.com/releases/2021/04/210408131415.htm