If disaster should befall the larger chick the parent can switch to feeding the youngest and it will exhibit a constant growth curve from the day of active feeding. From Wikipedia
Depends, a repo stays on credit for 7 years, and a bankruptcy stays for 11 years, after you have paid off a debt and they have received payment it should be taken of immediately, but you may want to get a free credit report and check and if it is still there call them and ask them about it.
Charge offs normally occur within 180 days of consecutively missed payments (they can happen sooner than 180 days). The 7.5 years the negative item stays on your credit report starts from the first missed payment to your lender.