There are a lot of signs that you can look to see if your dog is happy. Some of the obvious signs are the relaxed eyes of your dog. When the dog seems to feel content, it will be relaxed and it might play or just unwind in your company. Another sign that you have to look for is what the dog does when it is all alone.
When there is no destructive behavior, then you know that the dog is surely happy with you. A playful dog is also someone who is happy. The dog is already confident and relaxed. It is willing to play even if it would feel more vulnerable while playing.
Happy dogs have relaxed eyes and eyelids. They blink often and their gaze is soft. If your dog seems to be smiling, or if their mouth is relaxed this is another way they show they are happy. Every dog is differnt and expresses their emotions in different ways.
The most common way to tell your dog is happy is by their tail wag. If your dog is wagging his tail in a stiff motion, he is not happy. When your dogs whole body is loose and moving along with his tail, that is a way to know he is happy.