Hi guys! I recently moved into an apartment with my dog. We are having issues with him barking when I step out of the apartment. I never had this issue before when I lived in my house but am guessing it is because he is not used to the new place.. Unfortunately we cannot have him barking in an apartment thus we don't want to upset our neighbors.. I have tried the vibration collar.. Sat outside for ten minutes and he seems to have no response to it... Should I move on with a shock collar? I feel bad doing it this way but am running out of options!! Someone help us !!