To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Movie 1 Protocol used for the one-off test. Free-ranging dogs prefer petting over food in repeated interactions with unfamiliar humans Debottam Bhattacharjee, Shubhra Sau, Jayjit Das, and Anindita Bhadra Journal of Experimental Biology 2017. 220:4654-4660; doi: 10.1242/jeb.166371 Download Original Video