The first one is the toughest. Consider getting another one. I know it sounds crazy, but it really does make life easier. They like their own kind.
Very true, ours was like any only child - constantly need to be entertained or he would cause trouble- the second dog comes along everything changes.
His focus was the other dog- what's she getting that I'm not, then the constant playing with each other like little maniacs, wearing each other out.