My littlest Chihuahua would do that. Depending on where you live and the temperature in your home, your dog might be cooled. They need warmer temperatures than other dogs. I had to keep my house temp at 75 degrees for higher. The smaller the dog, the more likely this is to happen. Try wrapping him up in a blanket or a towel and hold him for awhile. See if this helps. If it does he will need a sweater to wear all the time and a place to lay down and keep warm. A fluffy pillow and a fleece throw work good. They really like to be with you. Holding them makes them very happy. And warm!
