On any given Saturday, dozens of people are lined up to feed the birds at McKinley Park in Sacramento.
But what we re feeding them could be causing wing deformities, according to bird advocate Judy McClaver.
She first noticed it about a year ago, when several birds in the park had wings that stuck straight out from their bodies.
I did some research, and found out it s caused by us, from the human food that we feed them, McClaver told FOX40.
Download the TV Guide app for iPhone, iPad and Android!