Once you get settled on which cage to get, Focus on the size of the perches to help him. My cockatoo is an older rescue that has a broken foot that never got attention. He can use that foot to move around and stand, but he uses it more for a stump to steady himself. He really has little use of the back toes. He constantly is putting the foot up & down, possible due to discomfort. (We give him anti-inflammatories for the arthritis & pain). He can’t stand on the bad foot to eat, and he can’t grasp food with it to eat standing on his good foot. He can climb around the cage wire. So - I tried an 8” gnarly perch - not smooth, but big & thick with curved uneven surface, and placed it a few inches from the regular perch. If I turn it to one position, he will take a larger piece of fresh fruit to the gnarly perch and can, for the first time, stand on his bad foot and eat his fruit by holding it with his good foot. The other side of the gnarly branch doesn’t fit just right to his foot.  He is a happy bird. He can’t use his claws as normal, so they got long enough to curl around almost to stick in his foot - now he goes regularly for nail trimming, which helps him maneuver even better.  Good luck with your bird!

No, it is definitely too small for a Green Winged Macaw.

32 Wide x 23 Deep x 41 Interior Height. This would be a good size for a Caique. 

No, the wires are spaced too far apart. I have this cage and I checked to see if it would work for my finches and they can slip out between the wires.

Hi kizi420, Here are the details. • Exterior Dimensions: 32" x 23" x 63" • Interior Height: 40" • Bar Spacing: 2/3" • Bar Gauge: 3.5 mm The dimensions do not include the seed guard which would add about 6 inches to the width and length (38 x 29 x 63). Thanks