I can confirm that the dragon kite does still change colors, in the past couple of days I have seen mine go from Onyixian to green. I'm not sure on the worg pup though as I don't usually summon him out.
"Even when you are winning soundly, you must always give your opponent a way to retreat with honor. If you don't, then he has no reason to surrender. He will fight until the bitter end, and you will pay a larger price for victory."