- Apr 4, 2011
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1.heredity 2. too much protein ( they had I think 24 % and then 20% for a lot longer than these this year) and 3. Brooder too hot.
I place the first 2 in the same category. I know some, (Espcecially muscovy breeders) believe it's genetic. I personally believe it's a function of growth rate and protein. Genetically, you can select for slower growth rates that acconidate your management regime. I personally believe my problems with wild species results from heat (right now I'm worried about a swan goose gosling, here in Louisiana it's mid to upper 90's), and the birds are not as active. As a result, they don't exercise the wings as much. I always have more problems with later hatched birds.
The NRC suggests 16% protein for a 3000 kcal/kg diet for 2-7 week pekins. As I've said, just protein content is meaningless without knowing the ME of the diet, and specific amino acids. It's recommended that the methionine+cysteine be 0.55%, lysine be 0.65%, and leucine be 0.91%. Again, based upon a 3000 kcal/kg diet. Higher ME diet allows for lower protein content, lower ME diet requires higher protein content because ME controls the amount of food intake.
Niacin is a constant 55 mg for all ages of pekins.
Clint
I place the first 2 in the same category. I know some, (Espcecially muscovy breeders) believe it's genetic. I personally believe it's a function of growth rate and protein. Genetically, you can select for slower growth rates that acconidate your management regime. I personally believe my problems with wild species results from heat (right now I'm worried about a swan goose gosling, here in Louisiana it's mid to upper 90's), and the birds are not as active. As a result, they don't exercise the wings as much. I always have more problems with later hatched birds.
The NRC suggests 16% protein for a 3000 kcal/kg diet for 2-7 week pekins. As I've said, just protein content is meaningless without knowing the ME of the diet, and specific amino acids. It's recommended that the methionine+cysteine be 0.55%, lysine be 0.65%, and leucine be 0.91%. Again, based upon a 3000 kcal/kg diet. Higher ME diet allows for lower protein content, lower ME diet requires higher protein content because ME controls the amount of food intake.
Niacin is a constant 55 mg for all ages of pekins.
Clint
