![Rats at Exotic Animals Stall in Las Ramblas, Barcelona [enlarge]](http://farm4.static.flickr.com/3216/2507137298_60113cd270_o.jpg)
Some baby rats at exotic animal stall in Las Ramblas, Barcelona. As I am no expert and I can't tell a rat from a mouse I leave you a link about these rodents' morphology: Rats and Mice: Differences. Of course the study of animals is not the purpose of this blog. The rats were in Barcelona and they happened to make a perfect pack.
