What stage is my husband in if he is peeing on the floor, putting silverware in his shoes and hiding things?

Your profile says he's in a NH. Why not ask his doctor? Is there some medical guidance you're seeking?

Only qualified physicians can be of any help in diagnosing and staging dementias. It sounds as though your husband is quite progressed and that you may soon need help or placement with him. You mention two things, but in the overall picture there are more important things that figure in diagnosing. See your husband's MD.