Leamarie,
Ha yea, hindsight is worth a million dollars
Most of these things seem SO suppressive to the newer Dog. But in a natural Pack, new guys naturally take second and tertiary places, and are pleased pink in the order of things. So many of us want to treat all of our animals equally, and it just doesn't work out best.
True, IF you had been informed about this natural process earlier, things would be a lot easier than turning the situation around in mid stream as you'll have to do. Just be patient and consistent, and you'll see how much better EVERYONE gets along !
One thing though...
I've herd of that "spraying" to correct behavior, but somehow, I just tend to use a stern voice while lightly pinching/holding one by the nape of the neck when you need to control his actions. Maybe a little shake, just like a Mom would do her Pup would be a more natural way of discipline.