A wagging tail is one of the most obvious signs that your dog is happy.
Dogs that are happy are often playful and energetic.
Happy dogs usually have a good appetite and eat their food eagerly.
Happy dogs are often friendly and outgoing towards people and other animals.
Happy dogs often have a relaxed and contented demeanor.
Happy dogs groom themselves regularly and take care of their own needs.
Happy dogs are often interested in their surroundings and enjoy exploring.