MINNEAPOLIS (AP) - McDonald's has dropped a Litchfield-based egg supplier after an animal rights group released an undercover video of operations at the egg producer's farms in three states.

The video by Mercy for Animals shows what it calls animal cruelty including a worker swinging a bird around by its feet.

McDonald's Corp. said Friday the behavior shown on the video is "disturbing and completely unacceptable." The fast food chain says it demands humane treatment of animals by suppliers.

The move also follows a warning letter to Sparboe Farms this week from the Food and Drug Administration that said inspectors found serious food safety violations at five Sparboe facilities.

A representative of Minnesota-based Sparboe Companies LLC didn't immediately return a call seeking comment.  But the president of the company did put a video statement on their website.

The three states affected are: Minnesota, Iowa and Colorado.

ABC News story:

(Copyright 2011 by The Associated Press.  All Rights Reserved.)

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