Hi, I have a 2 year-old male sheltie named Ashkii. I kept him kenneled for his first 1.5 years, to housetrain him while I was at work. When I packed away the kennel for good, he would bark like crazy whenever I opened the front door to leave. I finally solved this problem by making him sit and giving him biscuits to distract him while I walked out and locked the door. I had to rush in the beginning because he would gobble them and start barking anyway. Now he's so used to the routine, he just takes his biscuit to his favorite spot, watches me leave and doesn't bark at all!