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.
Creditors usually do not charge off a debt and turn it over to a collection agency until 180 continuous days of non-payment have passed, so you may have at least six months before a collection or charge off shows up on your credit report.