Your dog has an active set for existence instincts. Some things might cause him stress like a threat to his terrain, separation from his pack and unwanted attention from so many people and animals. The best part about it is that a dog is good at communication; therefore, you will easily note if you listen to him.
One way of listening to a dog or realizing any changes or stress is by body language. A stressed dog normally gives away his emotional state obviously. Your dog expects you to realize certain changes like shifting his weight in between his left legs and right legs. These are some of the signs of stress in a dog.
Paying attention to his facial expressions will help you to know if he is stressed. A dog easily communicates with his eyes so if he does not meet your gaze and looks away, it shows that he is submissive. This shows that he is communicating a message implying that he is not a threat so be kind to him. However, if he tends to narrow his eyes, it shows that he is not submissive and might be under threats. Panting, pinning ears back, lip licking and yawning are other ways you can use to know that your dog is under stress.
The sound of your dog will help you determine the state of mind of your dog. Some sounds that they produce could mean that an action is stressing them. A whine or whimper from a dog is an automatic sign that it is under pressure. If you ignore it, it starts to bark and if that is still ignored it results to a slow growl. Do not ignore that sign because it indicates that the dog has run out of all possible ways of telling you that it is stressed and feeling anxious.
The behavior of your dog is another sign to look out for. The behavior of your dog will change if he feels stressed. For instance, if there is a change in its routine, a new person has moved into the house or is absent or you have moved into a new place you expect to notice a change in its behavior. Its refusal to feed, excessive shedding or restlessness is indicators of stress. Therefore, be on the lookout for all these signs.
My Dog Gone Natural: Canine Stress
Professors House: Dogs and Stress
ASPCA: Canine Body Language
4 Paws University: Stress Signs in Dogs