will it work on my cage / Aviary?

Yes, it will work on most any bird cage including round ones. It will work on cages made of 1/2 inch by 1/2 inch welded wire to 1 inch by 3 inch welded wire to decorative wrought iron cages with bars running either horizontal or vertical. The feeder can be attached to a round cage but the larger the feeder size the larger the round cage will have to be. The only situation that would prevent the feeder from working is when a cage bar or structural design causes the inside and outside parts to be separated by 1/2 inch distance or greater. And for that gap, we have made adapters so the feeders will still work. Great for any exotic bird or aviary.