Colour Dilution Alopecia (CDA)

(commonly associated with blue × blue breeding)

Colour Dilution Alopecia (CDA) is a genetic skin and coat disorder linked to the dilute colour gene that produces blue/grey coats. In Cane Corsos, it is most commonly seen when blue is bred to blue, increasing the likelihood that puppies inherit two copies of the dilution gene.
CDA causes structural defects in the hair shaft, leading to progressive hair loss and chronic skin disease.

Important distinction: Not all blue Cane Corsos develop CDA, but the risk rises significantly with blue-to-blue pairings.

    • Symptoms

      • Hair thinning or hair loss, usually starting between 6 months and 3 years

      • Patchy or symmetrical bald areas (neck, flanks, back, ears)

      • Dry, dull, brittle coat

      • Broken hairs or “moth-eaten” appearance

      • Recurrent bacterial or yeast skin infections

      • Itching, inflammation, or scaly skin (secondary issues)

      Hair loss is often permanent, though skin comfort can be managed.

  • Treatment

    There is no cure for CDA, only long-term management.

    Management strategies

    • Medicated shampoos (antibacterial / antifungal as needed)

    • Regular moisturising and skin-barrier support

    • Prompt treatment of secondary infections

    • Omega-3 and omega-6 supplementation (supportive, not curative)

    • Avoid harsh grooming or frequent coat stripping

    What doesn’t work

    • Coat supplements claiming “hair regrowth”

    • Changing food alone

    • Steroids (often worsen skin quality long-term)

  • Prevention

    • Do not breed blue to blue where parents and grandparents are also dilute
      This is the single most important preventive measure.

    • Avoid breeding any dog showing signs of CDA

    • Ethical breeders prioritise health over colour

    • Educate buyers that blue is a cosmetic trait with medical risk

    • Prefer breeding strategies that preserve pigment integrity

Breed-specific reality for Cane Corsos

  • Demand for blue coats has outpaced responsible breeding

  • CDA is often downplayed or misdiagnosed as “allergies”

  • Rescue and rehoming populations show higher CDA rates

  • Skin disease from CDA can be lifelong and costly