thank you so much every one for carreing to reply to me!! 
ok, profressionally my doggies have had no training. when they first come to join my family, i taught them to sit, wait, walk on a lead, they bark at strangers, and genersally are well bahaved. though there are the behaviours as i mentioned before like barking for no reason, diggin, jumping etc that i want to stop now so that they dont think this is proper behaviour.  
i would love to have some usefull advise on how to stop bad behaviours??? 
how do i change the forum for the most people to see me please??? 
also, regarding mentally stimulating these pups, any suggestions please?