I know just what your going through. My friend has two Chiuahuaua's and the younger one is exactly like Daisy. There's just no breaking this syndrome it's in their genertic make up. Their antics are funny but I feel for the other dog whose always pushed aside and settles for less. If you try to give the other dog special attention the alpha dog always crashes the party and takes center stage. Poor Harley :-( :-( :-(