If a bird is sick, there may be various causes. A category that never actually needs to occur is the deficiency diseases. Strictly speaking, it is not a disease, but — as the word says — a defect. Once the cause has been resolved, the symptoms often disappear quickly and without lasting consequences.
Exception: if the defect occurs during the nesting phase or the growth of a young bird, irreversible abnormalities may occur — deformities of toes, legs or nails, blindness, or poor feather growth. These cannot be repaired afterwards.
Premium article
This article is available to subscribers
Subscribe and read all articles by Wout van Gils on keeping and caring for colour canaries.
