Evelyn, sable standard poodle
How long have you had the puppy? Most puppies need to sleep most of the day, but during the time they are awake they should be very active. I would be concerned about a puppy who just sits there when left alone. Like Twyla says, you need to feed her more often regardless, but sometimes it can take a while for a puppy to get used to their new environment. If it's been longer than a couple of days on the correct feeding schedule I would be concerned enough to take the puppy to the vet.