We are concerned about Casper and will be off to the vet next week but I thought I should pass this by you lot first to see if you have any helpful info.
He keeps slipping whilst climbing around the cage and compared to a friend's african grey doesn't seem very nimble. When on a finger he doesn't seem to grip properly and he has started chewing at the feathers on his left leg which is becoming plucked.
Is he getting arthritic in his old age?