Join Date: May 2015
Location: Ontario Canada
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Welcome to the forum, and as catalinadee has said it would be best to separate the birds to their own cages and allow them supervised visits outside their cage. Some birds are very territorial about their cages and simply refuse to share, this can lead to another bird visiting the cage being bitten and sometimes severely injured.
I have a friend with 2 lovebirds from the same nest and they hate each other, when she brought them home as young chicks the fights started right away and she had to separate them. After about 6 months of her letting the birds out to fly and visit with her daily for treats the birds would go back to one cage and all was fine for a little while then the fighting would start again.
She just figured it was best to leave them in their own cages placed side by side so they could keep each other noisy company. Safely.
In time you might find your two birds get along well and will go back to one cage but you need to make sure its a large cage with room for 2 or 3 food dishes and lots of perches and places for the birds to get away from each other. Also having 2 of everything you put in the cage helps keep the birds from fighting over toys, perches, swings, food dishes and more.