"The research suggests that large carnivores with large home ranges show a higher frequency of stereotypic behaviour such as pacing in captivity, " said federation director Dr Miranda Stevenson.

BBC: NEWS | Science/Nature | Carnivores' need for wild walk

So I think that's going to be very powerful in its visual imagery ... and they're going to see these images constantly on television, probably offsetting a lot of the negative imagery that they may see in shows and videos and sometimes in stereotypic comedy.

CNN: Commentary: Obama, Cosby, King and the mountaintop