Help!! Help!!

[sweetheart_love_06]

I hope you guys will be able to help me!!

A few days ago I got a puppy from my sister-in law. Since then I have begun to notice that she breathes really rapidly compared to my other dog. It seems a real struggle for her to breathe. Now she is vomitting on occasion, goes back and forth between diarrhea and normal stool. She will drink water but tonight she didn't touch her food. Other than that she is active and playful, no nose or eye discharge either. My other dog, who does not show any symptoms, I have had for several years has not been vaccinated and I worried if the puppy might have something contagious. I have been giving her puppy vitimans hoping that it will help her get over this. Any info would be much appreciated!!!

Thanks!