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Latour, M.A., Peebles, E.D., Doyle, S.M. and Panskv, T. 2001. Effects of broiler breeder hen age and dietary fat intake on circulating serum lipids. J. Appl. Anim. Res., 19: 73–84. The purpose of this study was to evaluate the effects of diet and broiler breeder hen age on serum cholesterol (CHOL) and very low density (VLDL) and high density (HDL) lipoproteins. In Experiment 1, breeder hens were bled at 20, 26, 32, 36, 43 and 48 wk of age, whereas in Experiment 2 hens were bled at 22, 36, 51 and 69 wk of age. Across both experiments lipids changed drastically with the onset of lay and as the breeders aged. In Experiment 1, CHOL and HDL decreased at 32 wk and remained low through 48 wk when compared to prelay values at 20 wk. A similar pattern was observed in Experiment 2. In both experiments, VLDL increased greatly with the onset of egg production. Despite the alterations in diet (saturated vs unsaturated diets) there were no differences in circulating lipids as affected by diet. The present stud...

Latour, M.A., Meunier, R.A., Huber, D. and Stallings, K. 2000. Ammoniated broiler diets reduce fecal phosphorus excretion. J. Appl. Anim. Res., 18: 91–95. To determine if diet ammoniation would alter the fecal characteristics of growing broilers during the last week of production, forty broiler chicks were raised on the same diet up to 28 days of age. On day 28 for two weeks, broilers were equally and randomly assigned to the following dietary treatments: (a) control or (b) control diet plus 3% added ammonia. Fecal samples were collected at day 28 and day 35 to assess any changes in composition. Across both treatment levels, the percentage of fecal calcium, sodium and potassium was reduced between day 28 and 35. Also, the percentage (7.3% reduction) in fecal phosphorus was reduced in broilers receiving the ammoniated diet. This study would suggest ammoniated diets reduce the level of fecal P in broilers during the last week of production.