why do dogs hang out their tongue during a hot sunny day? Share with your friends Share 1 Ankit K Kashyap answered this To mentain body temperature. and it help them to cool there body fast. 1 View Full Answer Himaswin Polaboyena answered this due to thirsty and to keep body cool 0 Shraddha Singh answered this To maintain body temperature and for evaporation 0 Subrata Ghosh answered this Dogs do not sweat from their body so they sweat through their tongue. 0 Arsalan Ansari answered this to maintain body temperature 2 Nishchith S answered this To maintain thursty and heat of the body 1