Why Do Dogs Wag Their Tails When They Are In Trouble. A dog that is very friendly may wag his tail more freely and even wiggle his hips at the same time. A tail to the right means the dog is happy. Dogs tend to cover their genitals with their tails whenever they are not very confident and they are a bit nervous about something. Happy sad excited embarrassed or angry your dog uses his tail to say a lot.
Remember that puppies are born blind and deaf. A dog with a raised tail is generally not met warmly by other dogs as this could be a sign for trouble especially if this particular dog encounters another dog that wont back down. Usually used to communicate Im no threat to other dogs and people. Your dogs tail is kind of like an emotional barometer and its important for dogs to convey their emotions to their social group. Many dogs will wag their tails from arousal or when performing predatory behaviors. Dogs tails are sensitive.
Just like us they experience what is called Rapid Eye Movement REM during their deepest stages of sleep.
In other words a tail wag means that the dog is open to interaction not that the dog is friendly Heres another way to look at it. A tail to the right means the dog is happy. A dog that is tentative about meeting a new person or another dog may wag his tail ever so slightly to indicate that he is insecure. If the tail of the dog is at a very low position or it is tucked between his legs then it generally means that the pooch is fearful anxious nervous or in submission. Its often accompanied by a relaxed facial expression bouncy movements and excitable vocalizations. Laying on their tail can be uncomfortable so they may wag their tail to ensure its out of the way before laying down.