From The Post:

Last week, “Shrek” took in just $500,000, nearly $300,000 below the weekly overhead, sources say. The previous week the take was $600,000. Production sources are hoping for a pop during Presidents Day weekend, but nobody expects the grosses to climb back up to last month’s $1 million-a-week mark anytime soon, if ever.

This was what I feared: it’s a huge show, big overhead, not great reviews, and a cartoon icon a little past its freshness point.  I like the creatives, so I wanted (and want) it to do well, but at a time like this, the writing was always pretty clearly on the wall.