[BigBird]

I came home yesterday to find my beautiful superb parrot Petie on the bottom of the aviary struggling to stand up right. He kept rolling around each time he tried, he managed to climb his way up on the wire once but couldnt get past a foot high the second time he tried, He tried to walk but would just lunge forward onto his chest. Anyway rang vet and she said it sounded like he is concussed. Can you guys think of anything else it could be? I kept him inside in a cage in the spare room over night, but he still hasnt come off the bottom of the cage. I cant see any wounds, he doest have that sick look some birds get before they die? So I have no idea. I dont have much money to be able to get him tested for anything I just have to hope that god is on his side.

Dont know what to do?