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The effects of oral and implanted hydroxyzine on growth, endocrine and carcass characteristics of lambs

  • T. R. Preston (a1), Euphemia B. Charleson (a1), N. A. MacLeod (a1), G. D. Rosen (a2) and J. Vernon (a2)...

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1. The results of four experiments on the effects of oral and implanted hydroxyzine on lambs are reported.

2. The effect of hydroxyzine on daily rate of live-weight gain ranged from +7·8% to −6·2% improvement with a mean value of +2·3%.

3. Lambs receiving hydroxyzine in the creep feed manifested significantly higher killing-out percentages and lower thyroid weights than the controls. Pituitary weights were not affected by hydroxyzine.

4. In an experiment on individually-penned, weaned wethers, given a high energy diet, hydroxyzine by either route did not affect live-weight gain but significantly increased killing-out percentage, rate of gain of carcass weight and fat deposition in certain tissues. Hydroxyzine did not affect the fresh weights of the pituitary, thyroid and adrenal glands or the weights of the teats.

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Gee, I., & Preston, T. R., 1957. The effect of hexoestrol implantation on carcass composition and efficiency of food utilisation in fattening lambs. Brit. J. Nutr., 11: 329.
Hale, W. H., ShermanW., C W., C, Appel, P. P., Reynolds, W. M., & Luther, H. G., 1959. The effect of low-level diethylstilbestrol implantation, oxytetracycline and hydroxyzine on fattening lambs. J. Anim. Sci., 18: 710.
Hansard, S. L., Robinson, N. W., Mullins, A. M., Brown, P. B., & Robertson, G. L., 1959. The response of ruminant animals to ingested tranquiliser drugs. J. Anim. Sci., 18: 1531.
Perry, T. W., Stob, M.,, Andrews, F. N., & Beeson, W. M., 1959. The effect of diethyl-stilbestrol, reserpine, hydroxyzine and hygromycin on growth and carcass quality of lambs. J. Anim. Sci., 18: 227.
Preston, T. R., Aitken, J. N., MaCleod, N. A., McDiarmid, A., & Rosen, G. D., 1960. An initial investigation on the effects of low level feeding of hydroxyzine on growth, endocrines and carcass measurements of fattening cattle. Anim. Prod., 2: 27.
Preston, T. R., Greenhalgh, I., & Macleod, N. A., 1960. The effect of hexoestrol on growth, carcass quality, endocrines and reproductive organs of ram, wether and female lambs. Anim. Prod., 2: 11.
Ralston, A. T., & Dyer, I. A., 1959a. Some metabolic effects of varying levels of hydroxyzine when fed to beef cattle. J. Anim. Sci., 18: 1500.
Ralston, A. T., & Dyer, I. A., 1959b. Effect of varying levels of hydroxyzine on blood characteristics and feed lot performance of steers. J. Anim. Sci., 18: 1181.
Sherman, W. C., Hale, W. H., ReynoldsW., M. W., M. & Luther, H. G., 1957. Nutritional use of tranquilisers in cattle and lamb rations. J. Anim. Sci., 16: 1020.
Woolfolk, P. G., Boyd, L. H., Greiman, B. J., & Davidson, T. J., 1959. Pasture and drylot fattening of western feeder lambs with and without tranquilizer. J. Anim. Sci., 18: 1158.

The effects of oral and implanted hydroxyzine on growth, endocrine and carcass characteristics of lambs

  • T. R. Preston (a1), Euphemia B. Charleson (a1), N. A. MacLeod (a1), G. D. Rosen (a2) and J. Vernon (a2)...

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