My dog rarely barks when in the house!! You know the occasional knock at the door and thats it.
But lately she's been barking to go out at night 2,3,4AM instead of taking care of business she runs around the yard barking and refuses to come in. She is a liver spotted Dalmation about 6 yrs old.
Is your pet spayed? She could be in heat. I do not have any other answers for this strange behavior but I would have her checked by the vet. If everything is ok then you can talk to a animal behavior specialist. Good luck, vectare