Gradually working up will work if you do it in small enough increments and take all the time needed and suddenly, he will get it and, if he's a healthy dog, will begin to accept the inevitable. My neighbors dogs barked for almost non-stop except for brief respites for 4 1/2 years before she finally trained them right and took all the time and effort they needed - then, almost by magic, they learned how not to go crazy and bark all day and evening long and ever since, it's been normal dog barking and wonderfully peaceful.
If you'd like, I'll post a step-by-step training for Separation Anxiety you can try but it will take a bit of persistent dedication.
__________________  Jeanie and Tibbe One must do the best one can. You may get some marks for a very imperfect answer: you will certainly get none for leaving the question alone. C. S. Lewis |