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This research aims to investigate the dynamics of yolk sac resorption and gastrointestinal tract development in chickens, ducks, and geese.

Dynamics of yolk sac resorption and post‐hatching development of the gastrointestinal tract in chickens, ducks and geese

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This research aims to investigate the dynamics of yolk sac resorption and gastrointestinal tract development in chickens, ducks, and geese.
100 male Shaver-Starbro chickens, 100 male Mulard ducks, and 100 male Landaise geese were housed in metabolic cages from day one.
Animals received starter diets for 21 days, followed by grower diets, with similar energy and crude protein content.
Yolk sac absorption and intestinal development were assessed at various intervals during the first 42 days of life.
30% of chickens had yolk sac residues on day 7, compared to approximately 10% in geese, and none in ducklings.
Liver and pancreas weights were highest in geese and ducks, significantly lower in chickens (p < 0.01).
The average small intestine length was significantly greater in chickens than in ducks or geese (p < 0.01).

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Randomized trial examines yolk sac absorption and gastrointestinal development in birds, indicating species differences.

Jamroz et al. (2004) studied this question.

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