This morning my rat Scar passed away. His brother was his only cagemate. I have another cage with two boys, Remy and Oliver, and I would love for Splinter (Bandit) to be able to live with Remy and Oliver. Ive use a combination of the carrier method and the bathtub to do intros thats worked well for me in the past. Would it be best to do introductions to each boy separately or both at once?