dog tail wagging more realistically

currently in Minecraft dogs wag there tails when walking and thats it my suggestion is that we make it that they do it at the following:

• when you hold bones or something they can eat
• when they see a player they have like a 10% chance of wagging there tail if it isn't there owner or it is untamed (it would be based on the dog eg some will do it others won't)
• a 50% chance if the player tamed it however if the wolf was attacked it would 100% of the time (because it knows you'll help it and it trusts you)
• and a 10% chance when walking (this is low because all the above could still happen)

all chances are ideas they can be changed