Nevison, C. M., Hurst, J. L., Barnard, C. J. 1999. Inbreeding and its consequences for social beahviour, housing and welfare in mice: A case of He ain't smelly, he's my brother'? . Animal Technology 50, 176-177.

As individuals of an inbred strain are genetically homozygous .. it was hypothesised that olfactory chemosignals of individuals may be the same, thus it may not be possible for mice to recognise individuals. .. Results indicated that outbred mice recognised individuals as familiar or unfamiliar through odours and responded to them accordingly. In contrast, inbred mice appeared to be unable to discriminate the odours of familiar and unfamiliar mice of their own strain and were thus unable to modulate their subsequent social responses on this basis as outbreds could. Inbred mice could, however, discriminate between own strain and other strain odours.