I'm sorry that your question wasn't answered in a timely manner. We don't have many avian vets on this site. Injury is very difficult to assess from afar. If you can handle Maguire carefully, please check the affected leg from the tip of his toes up to his hip for evidence of swelling or bruising. If seen, an avian vet (please see here: www.aav.org) will need to further evaluate those changes and perhaps X-ray Maguire to check for fracture and the need for splinting. If the leg appears normal to you, a soft tissue injury may have occurred and usually heals very quickly in these very high metabolic rate birds. I must also be concerned about a nutritional deficiency and weakness in that leg. Nutritional imbalances are a common cause of illness in our pet birds. What has Maguire's diet consisted of, please? Seeds should compose less than 20% of his diet. A diet of mainly seed and nuts has excessive fat, carbohydrates, and phosphorus; marginal protein; adequate vitamin E, and are deficient in amino acids, calcium, available phosphorus, sodium, manganese, zinc, iron, vitamins A, D3 (necessary for efficient absorption of calcium), K, and B12, riboflavin, pantothenic acid, choline, and available niacin. Ideally, a balanced pelleted diet such as can be found here: www.harrisonsbirdfoods.com or here: www.lafeber.com/pet-birds should be fed as well as hard boiled egg yolk, pancakes and cornbread, the tops of fresh greens, dairy products such as yogurt and cheese, fresh fruits such as apples, pears, melon, kiwi, and berries, vegetables such as broccoli, carrots, beets, asparagus, cabbage, sweet potato, and squash, and even tiny pieces of meat.
Please respond with further questions or concerns if you wish.