One of my 8 hens (my favorite one) was killed by a foster dog in my back yard. My hens (golden buffs, barred rocks, and a Rhode Island White) are 9 months old and get along well with each other. Yesterday I went out and bought a 4-month old Ameracauna, and they have terrorized her. She either curled up in a fetal position and played dead in the far corner of the run, under the coop, or hid in the nesting box. Today I finally put her in a large airline dog crate in the chicken run with her own food, water, and roosting bar, but she's so frightened she just hides in the back corner behind her personal feeder. Any ideas on how to better integrate her into the flock? The others just kind of peek out at her now. How long should the process take?