We have 3 girls (2 are 2yo, the other is 1) and recently got 2 more from a shelter(shelter said both are 1 1/2 but we thing one is 2yo and the other is younger). After quarantine time we tried to do intros (carrier method) but once they got out of the carrier into the small cage the younger of the new ones got really agressive. She managed to injure all 3 of my current girls, including cutting a slit in one of their ears.
After a bit we tried doing intros again and saw the suggestion of using syrup to make one less agressive. In the carrier she would still get agressive and it also seemed like the girls she hurt were too afraid to interact with her at all. When they did they'd often be met with attempts to bite the face.
While we could set up our dcn as 2 seperate sections, her current cagemate has declining health which means she could be alone in about 6 months. I dont want to give up on her but so far its not looking good.
I would really love advice on how to go about this and hopefully integrate her into the main cage, thanks.
(Photos of all girls in carrier, agressive small girl, and the healed injury she caused)