My 8 month old puppy has started panting for short periods during the night. I'll wake up to hear her panting and then eventually she'll stop. She has only started this week so I started thinking that something is wrong. I know dogs pant to cool themselves off but i have the air conditioner on and she has the whole side of my bed. She does seem a little more tired during the day and doesn't want to eat anything until nighttime, when she wants 2 servings of her food ( I usually feed her 1/3 cup three times a day). Other than that, she is not displaying any other symptoms. Would anyone know what this could be about?