Puppy

At this point in our lives the topic of children comes up well... everyday!
However we are currently thinking about starting off smaller... say a puppy? We have been talking off and on about getting a dog or puppy because Zoe is so social. Recently she seems to be getting into more and more things when we aren't home, which I know is because she is bored!
We know we would keep a puppy alive but puppies are similiar to babies in they way that they pee all the time and wake you up in the middle of the night! Having a puppy is very fun but it can also be very stressfull and would serve as a great test.
We got Zoe as a 4 year old dog who was for the most part already trained, we haven't watched her grow or taught her anything new, maybe a few basic tricks such as "down" and "off" but nothing extraordinary.
So anyways wish this puppy luck as he/she is going to be the most spoiled "lab rat" in the state of Missouri!