«There is no definitive evidence of outbreeding depression among Bornean orang - utans,» says Banes, «but our findings are enough to cause serious alarm.» (sciencedaily.com)
Although inherited diseases can occur in both non-pedigree and pedigree cats, they are generally more likely to occur in pedigree cats than in outbred domestic cats (domestic shorthairs or domestic longhairs). (icatcare.org)
To take just one feature as an example, a study of mammals of twelve species in zoos showed that juvenile mortality in inbred strains was double that of outbred strains (1). (thebullterrierclub.org)