You can find these products at your local pet store or check out the ads in the parrot magazines. Daily weighing of your bird is a must. Weight loss is often the first sign the illness, so incorporate a daily weighing into your routine. Breeding Blue Crowns may be somewhat difficult. Imported pairs may take a few years to adjust to their surroundings before they feel secure enough to breed.
Domestic pairs seem to settle in more quickly.
My pairs tend to breed in the spring and summer. The average clutch is 2-4 eggs, and the eggs are laid every third day. My pairs are excellent parents and they will happily feed the babies for the first 3 weeks, at which time, I pull them for handfeeding. I also reduce the amount of light and food to mimic the dry season. This method has worked well for other species of birds, too.