That is really valuable information. Thank you so much. I am leaving for 2 weeks to Italy in November, and it's the first time that my hen, Clovey, won't be around me during her waking hours every day (I work at night, and she sits by me when I sleep the better part of every day; she travels with me domestically). So it's been stressful for me to think about it because even I have separation anxiety when it comes to her. I want them to get along so that they can feel comforted by each other, but she's very imprinted because from about 20 days old to about 13 months old she was only around humans (she's and indoor bird with free rein of the house during the day). The hardest part of it is getting her to realize that she's a pigeon, just like him.
Mr. Chancey, on the other hand, was an unknown age when I found his battered body. He was probably under a year at the time, and he was most definitely quite wild (and still is, although he trusts us now). He's a pigeon and he knows it, whereas she's a pigeon and she doesn't have a clue.