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Facial Defects
This applies to cats showing brachycephaly and brachygnathia (Persians, Exotics), also to any cats with misaligned jaws (skew muzzle), brachygnathia inferior (under-bite) and brachygnathia superior (over-bite). Brachygnathia is particularly associated with short muzzled breeds but may be found in other breeds. Cleft lip, cleft palate and related defects are associated with brachycephaly. The mode of inheritance is not fully understood.

Recommendations: Breeding associations to determine an index defining over-typing. Breeding ban on cats not meeting this index. Breeding ban on extremely short-nosed cats where the upper edge of the muzzle is higher than the edge of the lower eye lid. Health check required for brachycephalic individuals: examination for breathing problems, tear ducts (not draining), shortened upper jaw, dental problems. Breeding ban on cats showing one or more of the described symptoms as these would produce offspring with similar defects. Examined animals to be microchipped or tattoed, stud books kept etc (as previously).

Recommendation: Modification of the breed standard of brachycephalic breeds to avoid an overly pronounced stop, too high nose, too short muzzle etc. Preference should be given to cats with longer facial bone structure. Breeders to avoid breeding from individuals affected by brachygnathia, cleft palate and other facial defects.

Rationale: Depending on the degree of muzzle shortening, food intake and chewing can be impaired.