Forehand and Backhand

Lately I’ve found that as my backhand has improved my forehand has deteriorated. Now my backhand is my best shot, while in the past I struggled with it (as most players do). There seems to be what psychologists call negative transfer of training from one hand to the other. The forehand used to feel natural and the backhand unnatural, now it’s the other way round. I plan to use my ball machine to get my forehand back into shape. Will my backhand suffer a corresponding decline? (David, my instructor, thinks I’ve just got lazy and complacent about my forehand. “Move your feet!” he shouts at me, while drilling me mercilessly.)