I just got my 2nd one. Yogi is 5 months and Dixie is 3 months now. I would definitely recommend that if you are planning on having two, getting them close together. I knew I wanted two and from all that I read and heard, decided if I wanted another one, I'd better do it while Yogi was still young. As they get older, they can get territorial, which can make it difficult for a young puppy and the older puppy for that matter.
Plus...it is soooo much fun!! I was so excited to be having two, but closer the time got to when Dixie was coming home, I started panicking a little bit. I mean, TWO PUPPIES?!? I was like "Am I insane?" My husband said the same thing. But all the worry was for nothing. They play with each other so much, that now, they both want to snuggle and sleep on me a lot more!!
Plus, if you are already taking one out to pee and poop, what's another one? You're already out there!!
It's a lot of work...feels like I'm constantly picking up after them, as they are running through my house every which way, but there is never a shortage of puppy kisses at my house!! All so worth it...