When given the choice between a free meal and performing a task for a meal, cats would prefer the meal that doesn't require much effort. While that might not come as a surprise to some cat lovers, it does to cat behaviorists. Most animals prefer to work for their food -- a behavior called contrafreeloading.

A new study from researchers at the University of California, Davis, School of Veterinary Medicine showed most domestic cats choose not to contrafreeload. The study found that cats would rather eat from a tray of easily available food rather than work out a simple puzzle to get their food.

"There is an entire body of research that shows that most species including birds, rodents, wolves, primates -- even giraffes -- prefer to work for their food," said lead author Mikel Delgado, a cat behaviorist and research affiliate at UC Davis School of Veterinary Medicine. "What's surprising is out of all these species cats seem to be the only ones that showed no strong tendency to contrafreeload."

Here is the link, via E Durbrow.  Having grown up with multiple cats, I can attest that part of the results should come as no surprise.  But why do other animals prefer to work for their food?