I was recently talking with a friend and mentioned that in some situations mice show empathy for each other. She was astounded and thought that, maybe, if more people knew this that their attitudes about animals might improve.
I hope she's right. Here's a link to a report on and a discussion of "Social Modulation of Pain as Evidence for Empathy in Mice." (Langford DJ, et al. Science 30 June 2006: Vol. 312. no. 5782, pp. 1967 - 1970.)