I got my budgie two weeks ago. He is very young. The pet store did not tell how old he is but I suppose he is at most 7 weeks old now. He has always been quiet and not eating too much. (I am comparing it to my previous budgie that I kept for a month and took him back to the pet store because he did not warm up to me. The pet store told me that he was three months old). So, I don't have much experience with raising budgies. Since this budgie is so young and new to his environment, I don't expect him to be so active all the time. He has been warming up to me and stepping up on my finger recently.
When I brought him home from the pet store, I realized that there is some bald spot on his head. I thought it was due to stress or other birds' intervening and I did not mind it that much. Please see the attached photo.
Five days ago, I put some lukewarm water in his bath and let him have a bath. But he got wetter than I intended, perhaps due to the amount of water in his bath. I took him very close to the radiator so that he could get dry quickly. He did get dry in about 20 minutes and everything was fine. The room temperature is always between 74 - 78 degrees in my house.
However, after five days I realized that his wings are shivering, he looks so tired and lethargic, and his head falls down very low when he is napping or sleeping, something that I have not observed before, as if he doesn't have the strength to keep his head up. He never had a huge appetite (again I am comparing him to my previous budgie), but I realized that he is not eating enough. I have been hand-feeding him but if I don't feed him, he is not looking for food in his cage. He is very selective of what he is eating. He doesn't eat anything other than millet. I realized that he can't crack the millet well (the pet store told me that it is due to him being so young), so I got him unshelled millet, he doesn't eat it either.
Unfortunately, there is no avian veterinary where I live so I can't take him for a check-up. I got him some vitamins and minerals that I am mixing with his water with the hope that he will recover quickly if he is sick.
I took a video of him shivering. The video doesn't capture his wings shivering very well. I think it is due to how many frames my phone can capture in a second. But, he really is shivering a lot and it is very noticeable. Please pay attention to the seconds 14-20. (Link to video: https://youtu.be/Dl-VuMjSakY
My questions: Did my bird catch a cold after his bath and his wings are shivering because he is sick? He doesn't have anything wrong around eyes or cere/nasal area. Or, is it due to stress/depression and being alone? I spend plenty of time with him everyday.
If he is sick, how can I treat him?
Is the bald spot something that I should be worried about?
Are there any other recommendations?
He is a very sweet little boy and I like him so much. He has been a great companion to me. I am terrified that he may not get well. Please help.