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.
Potential creditors, and anyone else who looks at your credit report, can see the debt and the fact that it was never paid. It takes seven years (five years for New York state residents) from on the original delinquency date on the account before the debt drops off your report.