Backyard-bred cats refer to cats bred in unregulated breeding facilities, typically small, home-based breeding farms that lack rigorous selection and management. These facilities often lack necessary veterinary checkups, genetic disease screening, and management, which can lead to health problems, genetic diseases, and behavioral issues in the cats.

Cats bred in backyards may have the following problems:
Health issues: Due to the lack of veterinary examinations and genetic disease screening, backyard-bred cats may carry genetic diseases or viruses, such as heart disease, respiratory disease, urinary tract disease, etc.
Quality issues: Due to a lack of selective breeding and management, backyard-bred cats may be of lower quality, such as in terms of body shape, coat color, and breed characteristics.
Behavioral problems: Due to a lack of proper socialization and training, backyard-bred cats may have behavioral problems such as aggression, excessive timidity, or lack of basic skills.