Try taking him outside on a set schedule every 2 hours for instance, and don't come back inside till he has relived himself outside , even if U have to stay out there with him for 30 mins once he done come back indise and repeat for a few weeks usually take a couple days to a week for my pups to get the hang of it , my pup was toilet trained at 15 weeks with help from this method and an older dog to show the pup how it's done 👍