ananyo writes "Activists occupied an animal facility at the University of Milan, Italy, at the weekend, releasing mice and rabbits and mixing up cage labels to confuse experimental protocols. Researchers at the university say that it will take years to recover their work. Many of the animals at the facility are genetic models for psychiatric disorders such as autism and schizophrenia. Some of the mice removed by activists were delicate mutants and immunosuppressed 'nude' mice, which die very quickly outside controlled environments. No arrests have been made following the 12-hour drama, which took place on Saturday, although the university says that it will press charges against the protesters. The attack was staged by the animal-rights group that calls itself Fermare Green Hill (or Stop Green Hill), in reference to the Green Hill dog-breeding facility near Brescia, Italy, which it targets for closure."