When I first saw the dog pets in WoW I was happy but then I saw them do this animation over and over:
Dogs do this when their anus itches and it usually has two main reasons and both mean they are sick. First is they are having worms and the other is they have an anal glands infection. This animation shows how the dog tries to scratch his butt. I think that is pretty disgusting and sad at the same time.
I hope Blizzard will add a new dog pet that does not have this animation and others instead. How about a playful one:
Yes, it's a minor problem and some of you will reply "we have much more important problems in the game", but I still would like to have a puppy dog pet that does not smear (lava) feeces on the ground every few seconds.