he doesn't have anxiety lol he knows it is okay to be alone. he usually snoozes.
and no his "stiffen" feel is from abuse. I see it all the time in abused dogs, they usually move stiff, lay stiff, submit stiff.
Breed for the breed, not for the money; the words any REAL breeder would understand.
You must know nothing in order to know all, for all is nothing and nothing is for all.