I just don't have room for so many cages, or time to keep them as scrupulously tidy as I like. I've kept my dear little Apollo (my first ever baby finch to hatch!), who has just turned two years old, and his young son, Twix, who is a few months old now. They're happy together, singing all day, and I can give them a nest again, let them build, and not have to worry about birth control. I set them up in a new pretty little mini-flight, 24 x 16 x 24, and decorated it with silk plants, wreaths, and branches, and once they take a few days to get used to their new home, they'll regain their daily free-flight opportunities. The new cage is just the right size for the spot I wanted it for, big enough to give two birds some flight without being enormous and ungainly like the former setup I had all the finches in (three stacked 30 x 18s).
In addition, I'll still have three other cages; Sebastian the canary and Sparky the dove each have a 30 x 18 flight to themselves (stacked), and Sam, Arthur, Sydney (budgies), Freddy and Todd (cockatiels) have a spacious F40 between them. This is the level I think I'm going to keep it at. No more - nine is manageable. Nine is the number I had when I moved her and got this room for the birds, before I went overboard...
@Elana, I have no idea how you can keep so many cages and not get burned out. O_O
I've redesigned the layout of the room again. It has been very minimalist for a while, but I miss having a more elaborate environment for them to play on, so I picked up a bunch of pretty silk flowers and found some really nice grapevines growing wild near the house and suspended a nice artificial canopy for the birds to enjoy. It has to be a bit different from my old set up since the cockatiels now would destroy the flowers if they could reach them, so they're all hung from the ceiling itself and off the branches. It shouldn't be as much work to keep clean with only a few birds, and who go back to cages for some of the time now. The teils and budgies especially are loving the new scenery.






