Blah, I hate to be a pessimist, but I want you to not breed for this year. During the time that you will not be breeding, I wan't you to re-study everything you learned about budgies. Learn about WHY *they* want to breed. What triggers them? What type of diet should they be receiving (I'm sorry, but a canary mix+tonic seeds+apples and carrots is deficient in every aspect). I will guarantee you that a simple change of diet will significantly decrease your chances of weak chicks, DIS, and egg binding. From the looks of it, now, you're simply not ready. Please don't take this offensively. I'm trying to help you can your birds and my best advice is to wait and study more until you can answer your own questions. That is the ultimate test, and that is when you KNOW you can go through with this planned breeding. Right now, I'm not so sure about that.