Lethal double crest gene in canaries and finches

Cause: Both copies of the dominant crest gene · Type: Genetic

Other names: Corona x corona، Crest x crest

Symptoms

• About 25% of the eggs die or hatch weak chicks with defects

How it spreads

Genetic.

Diagnosis

Pairing record.

Treatment

There is no cure. (All under veterinary supervision.)

Prevention

Always pair crested x non-crested.

Treatment and doses are decided by an avian vet after an exam; Zajel does not publish doses.

Other diseases

• Feather cysts (lumps)
• Inbreeding depression
• Hereditary hearing impairment in the Malinois

Sources

• KB (not web-verified this session): widely repeated aviculture/breeder consensus; treat with stated confidence
• birdtracks.io
• creatures.com (Gloster Canary page, snippet: crest gene lethal in double dose)