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Radial Hypoplasia in Cats: Welfare of Twisty Cats

Radial hypoplasia causes abnormal front limb development in cats. This guide examines welfare implications and ethical breeding considerations.

Key Facts

Radial hypoplasia causes shortened or absent radius bones in the forelimbs
Affected cats develop abnormal, twisted forelimbs and walk with difficulty
Sometimes called 'twisty cats' or 'squitten cats' — these terms obscure the welfare impact
The mutation is inheritable — breeding affected cats perpetuates the condition
Unlike polydactyly, radial hypoplasia causes functional impairment and likely pain
Responsible breeding should not deliberately propagate this condition

Welfare Considerations and Management

Radial hypoplasia welfare assessment shows significant functional impairment. Affected cats may have difficulty walking, grooming, and accessing resources normally. The degree of impairment varies with severity of limb shortening. Veterinary welfare assessment including pain assessment and quality of life evaluation guides management. Breeding affected cats to perpetuate the trait is ethically problematic. Affected cats require modified environments accommodating their reduced mobility.

What You Can Do

Do not deliberately breed cats with radial hypoplasia or other inherited deformities
Provide modified environments supporting mobility in affected cats
Ensure regular pain assessment and appropriate analgesia for affected cats
Advocate for breeding standards prohibiting deliberate propagation of welfare-compromising traits