Our sweet little 8 wk old baby normal has a strange habit of occasionally opening her mouth wide and closing it again. (Maybe once or twice a day that I've observed.) This is not aggressive behavior, since she does not pull her head back or strike when she does it. Her mouth, pits and nostrils are clean with no swelling or irregularities and what little I've seen of the inside of her mouth when she opens it is all pale pink with no redness. She's eating beautifully, having switched from live to f/t with no problem, and isn't showing any signs of a shed yet. Please let me know if this is normal behavior or if I should be concerned!