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.
If you are in the UK they will drop off after 6 years. Your credit report is like a 6 year rolling thing, though, so the debt amount may continue to report to your credit file until it is paid off, and will then show for a further 6 years after that.