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 close an account that was not paid as agreed and charged off, on the other hand, it will typically stay on your credit report for seven years plus 180 days from the start of the delinquency that led to the charge off. I hope this helps.