If you truly think it's an injury, you can fold it where it belongs & gently use vet wrap to bind it in place. Wrap the wing a few times, then a couple strips around the body to help keeo it from slipping off, then a few more loops around the wing. Only leave it a couple days & take it off at least twice a day to let him try to exercise it. Leave it off for longer periods each time. HOWEVER...if it is above about 75-80F there, I wouldn't wrap it. He will over heat & could have a heat stroke. If it's truly an injury & you have a place to put him out of the heat with a friend then try that, but not a good idea to wrap him & then leave him in the heat. Most sprains & strains will heal on their own in a few days anyway.