We have two dogs and I think Chase (our Puggle and first dog) is happier that Zahra (our Basenji) is here. They are both equally spoiled and loved but they have each other to play with and cuddle with which is awesome.
Having two made me feel less guilty about doing homework at the dining room table; now they play with each other during that time! Before I always felt like I needed to spend every moment I was home with Chase because he seemed lonely.
I guess we are lucky that they get along so well and that is probably key to happiness with two. Zahra actually has seperation aniexty from Chase and is miserable without him, she screams and will keep searching for him. Never mind that I am the hand that feeds her! LOL!