Is it possible to keep only two zebra finches? I want to get some Zebra finches but I only have a smaller cage that wouldn't be good for alot of birds, so I was thinking of getting two (1 female and 1 male) but the books I've read say there should be at least 3 pair (6 birds) and for my cage that would be way to many. I have no other caged birds in the house, so these would be it for now. So, if anyone could give me some clue as to whether this will work with only two birds or should I wait until I can get a larger cage, Please let me know your thoughts. Thanks!