Systematic alone time training from puppyhood prevents the development of separation anxiety before it becomes an established welfare problem.
Prevention of separation anxiety is vastly more effective than treating established phobia. Puppies that learn from their earliest weeks that brief alone time is safe and normal develop into dogs that cope well with isolation. The window for effective prevention is early - waiting until problems appear means weeks of modification treatment rather than simple prevention. Every owner starting alone time training in the first weeks of puppy ownership prevents future suffering.