I was bought up with working dogs and we have had pet dogs but I must admit I dont really know how often a dog must pee or poop? Our little dog which we adopted as a two year old adult is giving us concern. She hardly ever pees when we take her out and we cant find evidence of her peeing in the house. We have a cat door and she might be going out of her own accord but if she does it is only at night. She never pees or poops when I take her out to the grass after a meal. She poops when on a walk once a day and they look OK, our real concern is that she is not peeing, least not where we can find it. She is a 2 1/2 year old spayed poodle/pomeranian cross and is a dear little bundle of wooly fluff!