My male Shih Tzu(5 years old) is going crazy over female dog next door who's is in heat. He is not eating, playing or sleeping. I am planning to getting him spayed soon. But in the meanwhile id there anything that can calm him down? Like any drops or medicine?

Hi Keerthi. Pheromones can travel quite a distance making nearby male dogs go crazy. Neutering is the best option to overcome such behaviour. For now, make sure your pet is in room/house with windows closed. Keep him engaged throughout the day by providing either toys/chew sticks.