larek wrote:It's just for hobby.
Breeding birds is not something you should do for a hobby! It is extremely important that you have a solid understanding of genetics and parrot psychology, and be well versed in the behavioral nuances of whatever species you are breeding. You also need to know about proper parrot nutrition, proper handfeeding in case the parents reject the chicks (which is incredibly important to get correct, and very dangerous if you get it wrong - which is easy to do!) and how and when to wean the baby and onto what foods.
There are many, many more risks for the chicks but also risks for the parents. They have to be in good health or their chicks may be unhealthy too. Sometimes mated pairs can get aggressive and one can pose a threat to the other. Some hens suffer from egg binding - the inability to lay an egg once it has formed. This is life threatening for the hen! Others risk becoming chronic egg-layers and can literally egg themselves to death! Sometimes one of the parents will destroy the eggs, or kill or maim the chicks. Some parents won't feed their chicks and then it's up to you to make sure you properly hand feed. You also must know how to set up the nesting box to prevent splayed legs and other deformities in the growing chicks.
As if all this is not difficult enough, there are countless other problems which may arise that I haven't mentioned here (because I'm not a breeder and so I've never encountered all the problems you can have). But if anything goes wrong, you have to know how to care for the birds in an emergency until you can get to the vet. Avian vet care is NOT cheap and a non-avian vet won't be able to give you all the help you need. You could easily rack up thousands of dollars in vet care in a single breeding season!
And what will you do with the chicks? Some birds may not lay every year, but some birds can breed more than once a year. Breeding birds is not something you can profit from as a "hobby breeder". If you do not take it absolutely seriously, you can do irreparable damage to the mentality of the chicks and they will later end up as unhappy birds in a rescue somewhere.
I do NOT want to cause offense or seem mean, but the breeding of birds - or any other animal - is a very serious thing. I only want to prevent you from doing something for which you are unprepared. Instead of breeding birds and bringing more chicks into a world where they may not be properly cared for, why not adopt an adult bird from a shelter and give it a happy home?