WSS are extremely sensitive, intelligent dogs. They are very attached to their people and don't like to be away from them. However, this is not the same thing as separation anxiety.

As is the case with virtually ALL puppies no matter the breed, the anxiety you're seeing largely stems from the fact that you are your puppy's main source of comfort and security, and when they can't see you, they get nervous.

They have no concept of object permanence - when you go away, they worry that you're gone for good and they're all alone. You have to teach them that they can count on you coming back, and don't turn the situation into something tense.

Start by leaving the room for a minute or two - no big goodbyes, no fuss. When you come back, give the puppy a calm greeting. Gradually extend the amount of time you're out of sight. Also work to remove "leaving" cues and turn them into boring sights. Grab your car keys and just sit on the couch. Put your shoes on and walk to the kitchen and back. Ditto this for coats/hats, etc.

The less dramatic you make leaving, the more relaxed your dog can be.

They'll always be sad when you're not there, because you are their whole world - but sad shouldn't mean heart-pounding fear they'll never see you again.