Hi Gillian,
This can happen, even with a male & female. Most likely the aggressor is hormonal right now and maybe he thinks if he drives off the male, he can attract a female. This type of bullying is harmless if it doesn’t go on for too long. But if it continues, or escalates, you will need to separate them. It’s very stressful for the one that is being chased and can cause him to start feather plucking. If the fighting gets to the point that feathers are being pulled out or blood is drawn, you have no choice but to separate them. A cage divider probably won’t be enough, even if it’s a solid divider. If it’s not solid, they can bite each other’s feet through the divider. And the one bird may feel just as intimidated as before. A solid divider might help, but again, the one bird might still feel very intimidated and end up plucking. The best way to separate them is for each to have their own cage, and then have some distance between the cages so the bullied bird feels secure. I know you want to keep them together, but unfortunately birds have their own ideas, and there is no way to train them or force them to get along.
Thank you for asking Lafeber,
Brenda
