Breed and Gender?
I have no idea on the breed but for gender just keep an eye on their behavior. Boys have very obvious courting behavior. They vocalize and head bob. They'll also strut after females and feed them just like the girl is a baby. New birds need time to relax and feel secure again before they'll get amorous though...so give them some time to settle in and then spend some time just watching them.
- Pigeon Girl