Any change tips the flock balance but sometimes it's a good, fun thing. I had a lovely little partridge Wyandotte banty who was the only banty in the flock @ the time. I was supposed to get 2 but the breeder wouldn't sell me her sister as she felt she wasn't up to standard so I took this girl anyway & she was always right @ the bottom of the pecking order though so fast she stayed out of trouble. When I added new girls this banty suddenly found herself quite a lot higher up the pecking order & she was so delighted it was a joy to watch! She really came out of herself. Unfortunately she had reproductive issues that I'm pretty sure took her in the end. Just when I really needed a vet we went into lockdown & the vets notified us they were shut. It didn't last long but it was long enough.