Dogs communicate in their own ways. Like yawning, panting, whining usually means their tense and nervous and maybe in pain especially older dogs will pant and pant because they are in pain and that’s how they release that. There has been so many studies on tails and how that speaks thousand and thousands of words. It’s great if a tail is going in circles, some say if the tail wags more on the right it is a sign of positive feels and if they are wagging their tail on the left they are indicating negative feelings. It’s amazing what all our animals are attempting to tell us.