[Monica]

Good points on quarantine and using the extra cage for the new sun. Indeed, 2 months sounds far too young for a properly weaned sun, and even at that the chick could regress and want handfeeding. Your better off getting a 3+ month old chick, and even at that the chick could still be a bit too young.

As to how long it would take for two birds to become friends... Well, that depends on the birds themselves. It could be within a matter of minutes, to days, weeks, months.... maybe even years! And even at that there is no guarantee that the two will EVER get along. However, saying that you have younger birds, you may have a better chance than I do.

I have a approx 16 yr old cherry head conure that lives with my first cockatiel, and they have been sharing the same space for over 4 years now (I've had both for about 5 years though), however, it took several months for the two to bond and form a friendship. Would I trust my cherry head around another cockatiel? No.

I have more recently taken in a 12 yr old mitred conure, whom I hope, given time, will form a relationship with my cherry head. So far, they get along "okay" in neutral territory, as long as one (Charlie - mitred) doesn't get jealous or two they don't invade eachothers (Noel - cherry head) "bubbles". However, I am fully prepaired for the fact that they may never form a relationship either.

Point being, don't ever expect two birds to get along. If they want to live together (such as Noel and Casey the tiel), let it be THEIR choice, NOT yours. However, you should also accept the fact that they may never get along well together.