06/02/2015 11:11 EDT | Updated 06/02/2016 05:59 EDT


PHILADELPHIA - The Humane Society of the United States on Tuesday released undercover video footage it said shows the mistreatment of birds and unsanitary conditions at a major national egg supplier in the state.

The video was shot at Hillandale Farms in Gettysburg in late April through early May. The Humane Society said the farm's customers include retail giant Costco.