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Step 1
Choose a cage that's big enough for your finches to fly from one side to the other. They don't need a tall cage, but they do need a long one to get enough exercise. A common name for this style of cage is a flight cage.
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Step 2
Consider the number of finches you have. A pair of finches needs a cage at least 30 inches long. House larger groups of finches in longer cages. If that isn't possible, get a tall cage that's at least 30 inches long so your finches can establish their own flight paths across the cage.
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Step 3
Measure the spaces between the bars to make sure your finches can't get stuck in them. A safe size for breeding finches and for small varieties is ½-inch-by-½-inch mesh, but larger non-breeding finches won't slip through ½-inch-by-2-inch mesh.
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Step 4
Accessorize the cage minimally. Finches aren't interested in bird toys, and they need to be able to fly easily through their cage. Install a few perches at the ends of the cage. Finches enjoy swings, so you can add a couple of them out of the way of their flight paths.









