ABSTRACT
An investigation involving 640 turkeys demonstrated that the inclusion of lasalocid continuously from day-old to 16 weeks of age, at levels up to 375 ppm in the feed, produced no adverse effects; furthermore, the inclusion of 125 ppm lasalocid in the feed was compatible with the administration of 250 ppm tiamulin in the drinking water continuously for five days to turkeys over the same age range.
Subject(s)
Anti-Bacterial Agents/adverse effects , Lasalocid/adverse effects , Turkeys/physiology , Animal Feed , Animals , Body Weight , Coccidiosis/prevention & control , Coccidiosis/veterinary , Diterpenes/adverse effects , Drinking , Eating , Female , Lasalocid/administration & dosage , Male , Organ Size , Poultry Diseases/prevention & control , Turkeys/blood , Turkeys/growth & developmentABSTRACT
Vitamin E activity was first identified as a dietary factor essential for reproduction in the rat. It is now known that this vitamin has a far wider range of functions in the body than its role in fertility. It interacts with selenium-containing glutathione peroxidase to prevent the oxidative breakdown of tissue membranes associated with the hydroperoxides of polyunsaturated fatty acids. Relationships with other factors such as stress and vitamin C, have been proposed. The symptoms of deficiency of vitamin E vary according to species. With so many variables it is difficult to estimate the optimum allowances of the vitamin for the many types of livestock diets. These problems are discussed and the calculation of allowances of vitamin E in rations for both monogastric and ruminant animals is explained.
Subject(s)
Vitamin E , Animals , Humans , Nutritional Requirements , Vitamin E/metabolism , Vitamin E/physiology , Vitamin E DeficiencyABSTRACT
Horses with weak hoof horn, which becomes misshapen and crumbles around the lower parts of the hoof walls, pose problems for treatment in practice. The effects of dietary supplementation with a high level of the B-group vitamin biotin (which has proved successful in the treatment of the similar condition in pigs) were investigated in more than 40 cases. Varying degrees of improvement in the hardness, integrity and conformation of the hoof horn were observed in all cases. The signs and progress seen in three typical cases are described. It is concluded that dietary supplementation with 10 to 30 mg biotin/day (depending on bodyweight) for not less than six to nine months is a useful treatment to support other remedial measures in such cases.
