Failure of Feather Pigmentation in Bronze Poults Due to Lysine Deficiency

Further Evidence of the Role of Lysine in the Formation of Normal Bronze Turkey Feathers

“…The color of the feathers that were produced in this experiment agrees with the results obtained by Fritz et al (1946) and Grau et al (1946) which indicated that the lysine requirement of poults may be as low as 1.2 percent of the diet. The addition of lysine improved the rate of growth of the poults used in these studies; however, extensive studies on the growth rates were not carried out.…”

Supplementation of Poult Diets with Lysine

“…Supplementation of the 21.8% diet with lysine produced a marked increase in weight, and completely prevented the appearance of the white feather syndrome (Fritz et al, 1946). The addition of lysine to the 25.5% diet did not increase weight.…”

The pathology of the avian integument: A review

“…Valine, leucine, isoleucine, glycine, phenylalanine and tyrosine deficiency produce concave feathers, the feathers bending upwards from the body (Robel, 1977); lysine deficiency produces depigmentation (Fritz et al, 1946;Sanders et al, 1950) of turkey feathers and low arginine in the presence of normal lysine or methionine results in feathers with a retained sheath, loose barbules and thin rachis (Sanders et al, 1950). Lysine deficiency has been suggested as a cause of depigmentation of the feathers of psittacine birds (Harrison, 1984) but experimental work in cockatiels (Nymphicus hollandicus) has failed to confirm this (Roudybush and Grau, 1985).…”