I took Skye to the vet Friday, and the Doctor said he seemed/looked/is healthy. And Skye amused the Doctor and his Assistant by scratching his head/cheek in a weird way hehe. And the nurse/assistant said he liked to explore things.
Right now he is sleeping (and I wish my dog wasn't barking >_<) at the top of his cage and he seems to be sitting upright though both feet are on the ground, with tail close to the perch.
And just yesterday he was singing for like 3-5 minutes for the first time! I didn't get to record because I didn't want to move, since it might make him stop. He bobbing his head and everything. So I guess he is just scared of me being close or looking at him from a close distance.