This has been buggin me for a while now, does anyone know why some geese has deformalty of the wings, mostly seen in penraised birds. looks like thir wing grow invertly or backwards, if you seen one you would know what im talkin about.
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...with domestic geese but never with a wild goose. I don't believe a wild goose like that would survive very long. I don't know the cause.
when they are too well nourished the feathers grow out too fast.
I have mostly seen this in hand fed canadians, its a sad sight to see.
is likely what you are describing . . . a deformity from a high protien diet found in grower rations for domestic fowl.
I have found young waterfowl do best on maintenance (low protien 15-17% or so) diets.
There is nothing that can restore the wing; but to improve appearance pinioning (removal at the first joint below the carpal bone the primaries attach to) could be considered. On older birds, there can be excessive trauma or even loss of the bird.
It may be genetic. I remember this one family of perfectly healthy wild geese in Toronto who had 1 to 2 deformed offspring every year. They couldn't fly of course and would be taken away to a farm each winter.