Last week, I too saw an edgy chiller of a film with genuine 'edge-of-ya-seat' moments. The female lead detective was investigating the reason for personality swings that created animalistic monsters which was really just an excuse for slashes of gore and guts. There were some decent one-liners too.

It's had some great reviews on Rotten Tomatoes - an Audience Score of 95% liking it, and 98% on the Tomatometer.
Link: http://www.rottentomatoes.com/m/zootopia/?search=zoo