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
Simply send them a letter (with proof of delivery) using the contact information found on your credit report. Generally they have 30 days to investigate and get back to you, or the information must be removed.
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.