because someone has urinated on them. 
"
SupaFirePilot @KelloggsUS We are outraged. We've alerted *************** & are investigating. We will share more info as it's available
— Kellogg Company (@KelloggCompany) March 11, 2016"
[video]http://www.wfxg.com/story/31453904/video-of-man-peeing-on-kelloggs-cereal-assembly-line-emerges[/video]

"
— Kellogg Company (@KelloggCompany) March 11, 2016"
[video]http://www.wfxg.com/story/31453904/video-of-man-peeing-on-kelloggs-cereal-assembly-line-emerges[/video]