[matese]

Congratulations and thank you for rescuing.

I have to agree with lovetodream, I wouldn't keep them in separate rooms, your boy is curious, wants to know who is in his home, you say this girl is calm, I would let the two of them meet with you supervising of course, I would not let them be together unsupervised until you know your boy has accepted her. If you're unsure how your boy will react you can put him on his leash and do a nose to nose, nose to tail intro. Do not make any decisions right away, it takes time for an only dog to accept a new comer. If he loved your passed dog, he will love this little girl, he just at needs some time. Please keep us update on his progress.