Now it is apparently time to mention just an item or two that may help in the future to get you better responses. With that in mind do not take this wrong as I am not intending to get on you or anything. I want you to go back and read your first post as if it were someone other than you posting and attempt to answer it using only the information in the post and not what you know of the circumstances. Then read your second post with the same criteria in mind.
Now if you did as requested concerning your 2 posts, I believe that what you found is that based only on the information contained in the first post, that you could not honestly give any opinion an what was occurring. This is what I learned: you left her "alone" for 4 hours and she di nothing and when you " returned" she pooped an overly large amount. you have had her for a month and the two of you like different music.
So in the first post, there is nothing, there is no information. So lets look at the second post.
Here is what I get from the second post:
You had trouble logging on.
You took the bird to the vet 2 weeks ago, the vet said she was fine and may be a he.
You will get a second opinion.
Here you offer an alternate explanation for your problem. Now this is interesting as there was never any explanation offered in the first place as there was not enough information to go on.
You are still getting to know your bird and feel that you are beginning to be able to read her body language fairly well.
You have concentrated most of your efforts for the past month on training your bird and you are proud of your results.
You have limited knowledge or experience in the area of your birds health.
Here is the thing, I would dearly love to be able to help you and your bird, but in two posts you have given nothing as far as information concerning the problem and what led up to and surrounding the problem. I understand that it is hard to know what to put into a post, but you need to give us something to go on and make it just as detailed as is possible because we are not there and don't know anything except what you tell us, you are our eyes and ears into your world and what is going on there.
OK enough of that! I am going to take a few liberties and make some assumptions and try to put your posts together in some meaningful fashion and make some comments that may provide some help for you. I am going to need you to evaluate what I have to say and let me know what helps you and what doesn't.
As far as the poop and your explanation of what happened goes, from what I can get from it is partially correct. It appears that although you got your bird up and gave her breakfast that you left before she was actually awake and left her in a darkened room and when you returned 4 hours later and the bird woke up, she needed to poop which she did. This is all good and everything is functioning properly. Your issue is twofold, 1) that she did nothing while you were "gone" and 2) the amount of poop. These two things made you afraid that your bird was sick.
NOW FOR THE CORRECT ANSWER !! Your bird is not sick and everything worked out well but don't do that again because you could hurt your bird by doing what you did the way that you did it.
the reason for the extra large poop and the reason for you bird doing nothing for this time period is the same. You left her before she was fully awake in a darkened room, thus the bird just went back to sleep as it was not light enough for her to get up. When birds are asleep they do not poop so with another 4 hours of poop in her, it had to come out when she woke up which is why there was so much of it. Now that is the good news. The bad news is that this was the same as if you made her hold the poop for four hours which if it occurs too many times can cause internal injury to your bird. How many times is too many? In my opinion once is too many because it could have injured her other than this no one actually knows for sure , it could take 100 time before it causes injury or it could cause injury the very first time.
I don't know how old Lily the Jenday is, but you have only had her for a month and you have put in a lot of time training her and I am sure that you enjoyed it a lot and now I am going to tell you to stop that you are making a huge mistake for which you will pay for soon enough, if you don't stop.
At the very least, the first couple of month with a new baby bird should be spent with getting to know each other and building a bond based on mutual respect and trust. You did not do this and it is going to come back soon and it is going to bite you. Instead you elected to spend the time training and I am sure that you made a lot of progress and are proud of the accomplishments of you and your bird, Lily. And you should be. But you have just done what is called flooding and you are going to find out that it was too much, too fast. So stop with all the training and get to know Lily. Learn what foods she likes and do some research and make sure that you are providing her with a good diet. Spend the next couple of months petting her, leaving her back alone, and talking to her and just hanging out with her. In spite of looking like an adult, Lily is a baby and should probably still be getting soft foods at least twice a day for now. As a baby she needs a lot of companionship and reassurance as she was not meant to be alone at all. you will have plenty of time for training later right now you should be developing you bond and your relationship with her.
Go back to the introduction section and look at the top of the page where you will find a red button that says new topic. Press it and name it something and the introduce yourself and Lily to us. Tell us how old she is and you know how to introduce someone.