if you have an alpha dog in the house there is a product you can buy
"Bach flower essence" I have not used it but I do know of a couple breeders that use the rescue remedy ...
these flower essences are used singly or in combination (e.g., Rescue Remedy) to treat various behavior problems including anxiety, or when the animal's mental condition needs to be changed. The essences are generally given by placing several drops of the essence into the drinking water
http://www.nelsonbach.com/BFE_for_pets.html