It was only two weeks ago when Munchkin the Shih Tzu hit the web wearing a homemade teddy bear costume made by her owner. The adorable dog/teddy bear amassed millions of hits! Now, her owner is continuing the cuteness by having Munchkin exercise a bit on the treadmill wearing her teddy costume. So cute! [youtube https://www.youtube.com/watch?v=mVmBL8B-In0]…