It could be worms, with the bum dragging, but my old yorkie used to do it every now and then because he didn't have enough fibre in his diet (which allowed the anal glands to swell up) maybe the lack of fibre in her diet over the last few days has caused this to happen. Best course of action is off to the vet, they will be able to tell you not only what the problem is at the mo but also answer your other questions about how often to worm and where to get the pills.
Good luck |