i know what you are going through.Our dog George is nearly one and we are just about getting it right with him.Do u leave your dog for long hours alone during the day because he must get in a routine,ie as soon as you wake up he goes out,but feed him before this,and just before bed time.He is old enough now to control his bladder so it is a routine with him now,and it will take patiance to break.Do not shout at him when he does it and never rub his nose in it,just remain calm because shouting and screaming is a form of attension for him.Reward him if he does anything outside with a favourite treet.You may have tried these things,but you probably did not do it long enough for it to get results.Aso u can try putting news paper down,the dog should do it on this,then slowly keep moving it towards the door,eventually putting it outside,where the dog can see it.Once a puppy gets into a routine it is very difficult to break without a great deal of patiance.Good luck!!!!!!!!!
Nick,Manchester UK