I think having 2 babies at once is not much more work than having 2. My pups are 3 and 5 months and get along great. I no longer feel guilty about leaving the house because I know they have each other. I decided to get her a playmate now while she is young because in my personal experience it is easier to add to the family if they are close to the same age. I tried the older dog new puppy situation before and it didn't work out very well lol. I am getting all of the potty training out of the way and they can grow up together