I was headed out the door to work yesterday so I didn't have much time to say anything of any importance...lol
What are you feeding it? Seed diets aren't really very good for parrots because just like a child they pick out all the goodies. Even though the diet is completely formulated and balanced it isn't after the bird picks out what they want. They will also waste a lot of it. I would recommend putting it on a pelleted diet. Preferably a non-colored pellet like RoudyBush. The medium pellet should work well. If you go with a colored pellet like Zupreem, Katee, or the other name brands expect the bird to wast a lot of it to. 90% of the birds I've met have certain colors they won't eat. I have a friend who breeds birds and the brand he was feeding added a blue pellet to their feed. None of his birds will eat it. They throw it out of the cage. The Indian Ringneck hen I gave him won't even touch the blue pellets to throw them. She just picks around them...lol
Also birds can have anything we can have. However if it is bad for us, it is even worse for them. I once had a woman tell me her bird wasn't feeling well. I asked her what she was feeding it and she told me ice cream and cheetos.
I got her to take home pellets and a dried fruit and seed as a treat. And told her to go to the store and buy some fresh vegetables and fruit and offer it to him twice daily. So then she says to me, "So I need to lay off the Cheetos?" I just looked at her dumbfounded. "And the ice cream", was all I could say without screaming.
Atara loves scrambled eggs.
I would recommend trying different fruits and veggies with it to see what it likes. You shouldn't have to peel anything. The bird will do that on its own. I always offer some morning and evening in a small cup for several hours. Once a day is fine though. Sometimes Atara doesn't even get that.
Caffeine and alcohol are big no-no's. Avocados are also toxic to birds and shouldn't be fed. There is a debate about whether it is the seed, the skin on the seed, the flesh, or the skin on the fruit, but why chance it. That also rules out guacamole.
Some birds will be nervous in front of windows. So if the bird acts really stressed out near one move him away from it. Some birds love windows like my Jenday Conure, Atara. She will plaster herself to the glass to watch things going on outside. Every bird is different.
You will want to provide the bird with different sized perches to prevent arthritis in the feet as the bird ages. people use to just keep the one dowel rod in the cage and years later find out that the bird couldn't hold onto it anymore because its foot wasn't properly exercised. So different sizes with varying diameters and textures are good. You will want to give the bird several toys. Usually something the bird can tear up rather quickly, one that is fairly long-lasting, and one that is indestructible. You will want to rotate these out every couple of weeks for new ones. Bored birds are destructive, loud, and can begin plucking their own feathers.
If you do keep the bird because you can't find the owner you will probably want to invest in a larger cage with sturdier bars and welds. The cage it is in now will probably not hold the bird long-term. It can take its beak and go along like a pair of wire cutters and snip that wire bend it and get out. If you think dogs are bad about tearing up stuff. Just wait until you come home from being out all day and find out your parrot got out of the cage...
You will probably want to look into Prevue cages or the newer EZ Care cages which feature the standard door, but the whole front of the cage swings open as well for easy cleaning. It will also be much easier to get the bird in and out of the cage.
That's all I can think of for now.
If you have any questions feel free to ask. Sorry about writing a book.