Not sure that is sepration anxiety but rather a dog that is over bonded and needs some self confidence.
Rather think that working an appropriate desenstization program for sepratation anxiety be a good idea.
There are a few good ones if you google search.
Plus you need to look into him getting comfortable in short amounts of time with other humans...no easy but it will help.
JL
__________________
"The truth about an animal is far more beautiful than all the myths woven about it." Konrad Loranz |