I do a thing with all my Yorkies that's unconventional.  I was told by a veterinarian that I trust that giving our small Yorkies the full vaccine is not necessary and can be harmful to them.  She then went on to explain that the same size vaccine given to a lab puppy is given to a Yorkie puppy and told me a few stories she had heard of pups getting sick right after being vaccinated and then taken to her office.  She told me one died on her table.  I don't know, just scary to me.  I am not validating this but I have since always had my veterinarian give only half the vaccined dose.  It is not any cheaper but I do not have the fatigue or weakness I have heard of other Yorkie owners complain about.    
 
As far as exercise I think they get enough indoor or outdoor...until they are old enough.  
