Well, if you can't have your own home gym, there's no reason your bird can't be luckier. This hand-crafted gym--for parrot-sized birds from conures to macaws--is made of premium hardwoods, and the dowels of the structures can be altered to challenge your pet. It comes in six basic designs, from a mini-gym that fits on top of a flat or domed cage to one 7 feet high by 32 1/2 inches long by 24 1/2 inches wide. There is even a scaled down gym for cockatiels. Attachable accessories include exercise and play toys to chew on, swing on or ring. All models are available at Advanced Avian Designs, in Santa Monica, where they can be seen by appointment; you can visit with your bird. Or call for a catalogue: (213) 826-9536. Pride & Groom, in Torrance, carries three sizes. Prices range from about $40 for the mini-gym to about $250 for the largest model.