Its not really thier age that determines how many times a day they go potty. Its the amount and quality of the food. How many times a day you feed them. For example.... Raw food usually takes 5 hrs for a dog to digest, Kibble takes 12 hrs. So when you space your food according to your schedule you may see your dog go two to three times a day.Now these figures are based on my Collies from a Breeder/show friend who is studing to be a hemopathy/holistic vet.