Princess Ruby is 6 months old, only been with me for about one week, and has alrdy grown very attached to me. I am very worried that if I introduce another female she will be aggressive or jealous of the other rat. Are female rats similar to female mice? I always had groups of female mice who loved eachother very much... Do you think the sooner I intro a new rat, the better? Or should I just give Ruby lotsa love and attention as I have been and forget about another rat? I know rats like to have rat buddies but she has shown some signs of dominance and I don't want her to injure any other rat. Let me know your thoughts and opinions (and where you learned your info if possible.) Thanks.