Dogs that sigh all the time are actually expressing their emotional state at the moment, so pay attention to how they sigh. When a dog sighs and doesn’t look at his owner, he may be sighing because he is frustrated that his owner isn’t playing with him. If you hear your dog sighing after taking him out for a walk or playing with him and his eyes are half-squinted, this means that he is very content and in a happy mood, and he will also sigh contentedly when he is asleep.
