A recent study has potentially proven that dogs—while being our best friends—might be big, fat liars. Marianne Heberlein (who studies dog cognition at the University of Zurich) was watching her own pets when she got the idea: she saw one dog pretend to look at something outside, to trick the other pooch into moving from the best sleeping spot in the house. That clever dog led Heberlein to find out if our pooches would trick their humans too—if it meant they’d get a treat. Turns out, they will. Head to New Scientist to find out more about the experiment.