I thought I´d update this a little, as I´m not convinced either way about protein/heredity, etc.
I´ve always (4 breeding seasons) fed my goslings the same way... corn, and and little chick-crumb twice a day, and plenty of grass and greens. Only last year did I have roblems with angel wing. 6 out of 19 got it. No problem, I wrapped them... This year, I raised more goslings than before.. 23. Not one got it. Same parents as before, and I also used some of the birds that I had to wrap last year just to see what would happen. All fine. Just thought I´d let those who may be interested know.
I´ve always (4 breeding seasons) fed my goslings the same way... corn, and and little chick-crumb twice a day, and plenty of grass and greens. Only last year did I have roblems with angel wing. 6 out of 19 got it. No problem, I wrapped them... This year, I raised more goslings than before.. 23. Not one got it. Same parents as before, and I also used some of the birds that I had to wrap last year just to see what would happen. All fine. Just thought I´d let those who may be interested know.