I try to use what is called positive reinforcement training with my birds. I tend to follow the models described by Barbara Heidenreich
www.goodbirdinc.com. What I have learned is that if your bird isn't doing the behaviour that you want, then you try to break it down into smaller behaviours that when put together will lead to the bigger behaviour.
For example, at the moment we are trying to get Sherlock to take treats from your hand but the problem is that as soon as you approach him, he freaks out. So... we need to try to break into down into something easier for your bird and gradually build to getting him to take treats from your hand through the cage bars. There are no right or wrong ways to break it down. You just try something, see if it works and if it does, try to progress it further. In bird training language, each step that you break the behaviour down to is called an approximation. So, here are some ideas of approximations you could try.
Overall aim: get Sherlock to take treats from Siva's hand through the cage bars
Step 1. Cut up a heap of different birdie-safe treats and put them into a special treat bowl in Sherlock's cage. Step back far enough so that you Sherlock is comfortable but so that you can also observe which treats Sherlock likes the most. Do this for a few days in a row.
Purpose of Step 1: Figure out your bird's fav foods & make sure your bird is used to eating them and knows what they look like.
Step 2. Withdraw the most fav treats from the birds regular diet. From a distance where your bird feels safe (that is, it isn't panicking), hold up the treat so that the bird can see it and take one small step towards the cage talking gently to your bird. If your bird freaks out, stand there calmly but don't move close. Wait until he is calm again and say "good bird" or whatever cue you want to use to indicate that your bird has done the right thing. As you say "good bird", pop the treat in your bird's food bowl.
Purpose of Step 2: Helps your bird associate its fav treat(s) with you.
With step 2, over time, you should be able to get closer and closer to your bird's cage before it freaks out and eventually you can be holding the treat between the bars for your bird to take it. At this point, your bird my freak out again... so once again, you wait until he calms down, and reward him for being calm by saying "good bird" and placing the treat in his food bowl and moving away. Next time, maybe he will take a step towards you before retreating... that is also a step in the right direction, or maybe he will look longingly at the treat... also a step in the right direction.... reward that behaviour with "good bird" and put the treat in the food bowl.
At any stage, you can refine the steps. See what works and adjust accordingly. For example, when I was taming Charlie, I used a plastic baby spoon to give him treats before I got him to take them from my hand. However, at first he was also scared of the spoon... so that won't always work either... Go with what works. If you ever move to quickly through the steps, just go back to the last step that worked and try again. Eventually, with patience, kindness and a bit of smarts on your part, you'll figure it out... and the good thing is that you will have a relationship with your bird that is based on trust and respect.
Sometimes progress will seem slow, so remember to reward yourself and tell yourself how good you are doing even with the slightest bit of progress... .and you know you can always share your progress on here too... because we will understand where non bird people may not!
Good luck and best wishes! Don't give up on Sherlock, there is always hope.
Ellie.