So, Rowan is getting his big kitty teeth, but he has two sets of fangs in his upper jaw. How long should I wait until I take him to the vet to have them pulled? The new teeth are in farther than the old ones, right next to them, so I'm worried that the roots never went away. They've been like that for maybe a week, and he's seemed a bit out of sorts, and biting his sister and I. Could the two sets of teeth be causing him pain?