I purchased a 9 week old puppy a few days ago. He has suddenly started to throw up his food today and he had a runny stool. He is still playing though. I gave him a bath yesterday. His body was still a little wet when I took him out to the bathroom in about 45 degree weather. Do you think the vomiting is related to him possibly getting chilled. He did not appear to be uncomfortable as I played with him.