That's the only thing I can figure, as she seems fine now! My son and I were walking the garbage to the road, with a pack of beagle pups following as usual. There is a small creek that crosses the driveway, which is no big deal, the pups go through it all the time. We were coming back, and I turned to see where 'Meanie' was, since she is almost always right under my feet. She was walking, but not very well. She was picking her legs up really high, I thought she had hurt her foot. I picked her up, and she wanted to lay on her back, with both paws beside her head??? After a few minutes she stopped this, but she was very shaky, and her head was wobbley. I thought she was going to die! After about 10 minutes, she was running around the yard like nothing happened. The road is about 1/4 mile away, and it is fairly warm today, in the mid 70's. The water running in the creek is very cold, and I know the pups were all getting a drink as they walked through. I'm thinking it has something to do with the pup being hot and drinking cold water? What do you guys think? She seems just fine now, but it was surely scary!!