Hi there........could you maybe seperate the one being beaten up from the others and introduce again to the one you think is hurting her slowly on neutral ground and build it up that way? I dont really know what else to suggest other than try going back to basics and starting intro's again or filling their cage to the brim with toys and hammocks and stuff to give them something else to focus attention on and monitor them carefully..........i have 24 rats currently and they are in 2 groups.....1 girl mischief and 1 boy mischief! I have 11 girls together and 13 boys together and have never had any issues!!! I hope my suggestions help you and your girls stop fighting xxx

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*Carla*

To the world you are only one person,to your pet you are the world!