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Seattle-style caging of the type used in this study (upper cage of two-tiered unit). Mesh side gates open to reveal grooming-contact bars on one side (rear of photo) and unobstructed opening on the other (front of photo). When two mirror image cages are connected with openings facing each other, the cage provides full contact (FC). When the cages are connected with grooming-contact bars facing, they provide GC.
