My suggestion is to separate the two males. While they live in separate cages, you can place the cages together so that they see each other. All the books I've read indicate that canaries aren't social birds, as are zebra finches, and they can live alone and be perfectly happy. If you decide to get females, I'd place them one to a cage with the males, or else the girls will fight over the males.
It might be a better idea to let the canary with the one eye live by himself to avoid the risk of being hurt again. Does he function well with the one eye? You might need to do some cage adaptation for him. Be sure to keep food and water, perches, etc, in the same place in the cage, so he can find those easily.
Good luck and please keep us posted on your bird.
>>I purchased a new canary a few weeks ago to find his head with a hole in it and a deformed eye. The petstore assistant said he was attacked by another bird and only had one eye. After about a week he ran up and down at the front of the cage trying to get to my breeding pair of canaries, so we decided to buy another canary to live with him. We bought the new canary as a female but soon turned out to be a male. The first canary seemed pleased with his new friend, but they have started to squabble. There ins't any physicle contact, just chasing and displaying.It is getting worse and I wondered wether it would be wise to add a group of females or seperate them.I'm just concerened about the bird with the deformed eye. Thanks for any help
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Canarymom
Finches: Melanie, Fritz, Casey, Sandi, Bunkie, and Sarah
Canary: Paulie
Budgies: Sammy, Curaco, and Pablo
Cockatiels: Elmo, Andy, Cleo, and Marley
And
My Rainbow Bridge Flock who are now singing in that other World