I don't think it matters either but if I were you I would definitely adopt one soon so that they adjust to each other relatively easily. Also, makesure you gradually introduce them to one another. On the first two days keep them separate. Then give them opportunities to get to know each other without real physical contact .... like keeping one in a crate while the other one smells....etc. Then on the next day, let them play together but make sure it is supervised and know that they will wrestle (just make sure no violent play that draws blood).If you take the extra time to introduce them, you'll see the great results of a good friendship. Remember the reason to take it slow is so that your liitle girl isn't threatened by this new companion. good luck! and congrats!