Ah, sorry, should have clarified--the male bird is not aggressive and never has been, even when all four where in the same small cage (30x20). It was only my hen, Devil, who was aggressive, and even then, most of her aggression was not physically harming to the other birds--it was primarily annoying flights backkkk and forth to try and win the perch space next to the male away from the other girl.
I originally separated them because the bonded pair laid eggs and the extra hens were being too nosy/trying to bump Shorty from the nest to take her place and raise the eggs--unfortunately, the pair proved to be terrible parents (I should have let one of the other hens do it!!) and they didn't feed the chicks--with it being completely the wrong size nest due my own inexperience, I wasn't even able to see there were chicks yet, so they died and--these being my first birds--I was a little traumatized. D; (Hence no desire to let the pair breed right away again. Also my parents got them at a pet store which is really not the best, so they may be related anyway.)
As for adding the four of them back together, I'm not afraid of there being any massive fighting (their cages touch currently with no fighting through the bars and they all sleep on the platforms I put in back to back, so they like/tolerate each other to some degree at least), just more afraid that the two extra hens will annoy the bonded female and try to "steal her man" and cause general unrest.
I also thought of doing a trade to make it two pair, BUT my third hen, Blotch, is slightly deformed--she's not handicapped or anything, but she's not going to win any breed-standard prizes or be particularly desirable breeding stock in anyone's flock, so I doubt anyone would take her. And I'd really rather not trade a beautiful hen (Devil is the prettiest one I got!) just to pair a male up with a hen with genetic flaws.
Lastly, I also have the problem of space. This new cage is large, and I currently live at home with my parents due paying off college debts. At the rate I am able to save and pay off debts right now, I won't be able to move out for about one more year. My parents have three large cats. So my birds stay in my bedroom and nowhere else. Once I put the large cage in--which I cannot avoid doing anymore, given how much we sank into it--there will be no real room for the two 30x20 cages I have now except in emergencies. (I have a smaller hospital cage which currently lives in the closet, but actual birds cannot live in a closet! XD) Since the original diagnosis of Devil was that she just "needed more space," we didn't exactly plan on needing multiple flight cages in same the room.
So basically, tl;dr:

My hens are the brats here, and it's pretty obvious they're trying to steal the man (who would happily breed with all of them, I'm sure. DDDD;)

Trading would be pretty much impossible unless I found someone willing to take a genetically flawed bird.

My bonded pair are not very good parents and may be related, so I'd rather not breed them to make a male.

I soon won't have room for multiple flight cages except in emergencies because my space is limited and will be so for the next year.
Besides feeling kind of trapped between a rock and hard place right now, I'm trying to sort through
the options:

Find a breeder and buy a male then ask if the breeder will take Blotch for from me for free, which I would feel kind of bad doing. (I've never abandoned an animal or asked someone to take one off my hands...). Then I would hope that the two pair don't bother each other.

Get two more males and make three pair in the big cage, but provide no nests until next year, when I can move into a place of my own with no cats and have room to separate them into separate breeding cages--if I cave in and let them raise clutches at all after the traumatizing experience the first time 'round.

Offer both my extra hens up for sale or free to a good home and have just two birds in that big cage (which, ugh, I don't think my parents will let me do because the birds were a gift from them in the first place).
Finally, my last option which I really don't want to resort to: The big cage can be divided horizontally into two cages, each about 23 inches high (so 49x26x23). (I designed it that way!

) The cage calculator still says that four birds can be kept in that space because of height not being as important. Theoretically, this was so I could divide my "two pair"

for breeding in the first place. I could
leave the divider in and keep them separate forever.
I would really prefer not to keep the four birds I have this way, because I wasn't smart enough to make the divider see-through, so I will need to buy another full spectrum lamp, as well as a whole other set of dishes, etc. (The cage is hardware cloth, so hanging things off it makes me nervous = all covered floor dishes.) I also think that not being able to see the other pair but hear them would be very frustrating for the two hens, as they shriek the moment I take the boy's cage away for cleaning and I love my birds to the max but if they constantly shriek because they can't see each other, I might go crazy. This is still all in my small 10x11' bedroom...
Theoretically, the same would be true if I got two more males and had three pair. If two pairs were fighting, I could divide the cage so that those pairs could not contact each other. (Now the problem would be if all THREE were fighting...

). Again, however, dividing the cage is not ideal because I designed and built this thing with no wood-working or engineering experience... Ugh, not to mention I'd have to have some place for quarantine of new birds, and by the time that was done, if there were problems, I probably wouldn't be able to take any new birds back to where I got them...
I guess I should just make pro and con lists...
