There is no peer-recviewed published data on inter-cat conflict in neighbourhoods, but the treatment of cat-inflicted bite and scratch injuries are a mainstay of general practice. In one unpublished study, the prevalence of owner-reported cat-infliucted injuries that did not require treatment was 1.09 per cat per year for males, and 0.36 per cat per year for females. The rate of injuries that required veterinary treatment was approximately half this rate for each sex group. The same study found that 16.8% of cats experienced severe problems of being frightened or attacked by neighbourhood cats in the garden, to the extent that it was difficult for them to go outside. Cats were more likely to be severely affected if their owners observed large numbers of cats frequently visiting the garden, indicating that the problem related to local overpopulation and competition for resources. 52% of cat owners in this study indicated that neighbourhood cats had entered their home to steal food and fight with their cats. This indicates that the problem of inter-cat aggression are potentially more severe than reported.