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Nutritional disorders
/content/chapter/10.22233/9781910443194.chap20
Nutritional disorders
- Author: Keith Warner
- From: BSAVA Manual of Backyard Poultry Medicine and Surgery
- Item: Chapter 20, pp 233 - 239
- DOI: 10.22233/9781910443194.20
- Copyright: © 2019 British Small Animal Veterinary Association
- Publication Date: September 2019
Abstract
Nutritional disorders are most likely to be seen in rapidly growing birds or those laying a lot of eggs. Investigations of nutritional disorders should initially assume a less than ideal diet, and obtaining a thorough history is essential. This chapter covers approaches to treatment, perosis, vitamin, calcium and phosphorus deficiencies, and calcium tetany.
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Figures
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20.1
A chick showing ‘curled toe paralysis’ as a result of riboflavin deficiency. (Image by Lucyin, licensed under CC BY-SA 3.0 (https://creativecommons.org/licenses/by-sa/3.0/deed.en) © 2019 British Small Animal Veterinary Association
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20.1
A chick showing ‘curled toe paralysis’ as a result of riboflavin deficiency. (Image by Lucyin, licensed under CC BY-SA 3.0 (https://creativecommons.org/licenses/by-sa/3.0/deed.en)
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20.2
A chick with ‘clubbed down’ as a result of riboflavin deficiency. The feather has not broken through the feather sheath, resulting in the appearance of a club. © 2019 British Small Animal Veterinary Association
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20.2
A chick with ‘clubbed down’ as a result of riboflavin deficiency. The feather has not broken through the feather sheath, resulting in the appearance of a club.
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20.3
Encrustations at the corner of the beak and around the eyes in bird with biotin deficiency. (Courtesy of Professor C Whitehead) © 2019 British Small Animal Veterinary Association
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20.3
Encrustations at the corner of the beak and around the eyes in bird with biotin deficiency. (Courtesy of Professor C Whitehead)
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20.4
(a) A normal growth plate showing the usual spatial relationship between the proliferative and hypertrophic zones. (b) A growth plate showing a large increase in the relative size of the proliferative zone as a result of a calcium/vitamin D deficiency. (c) A growth plate showing a proliferative zone of relatively normal thickness and a hypertrophic zone of increased thickness due to a phosphorus deficiency. (d) A growth plate showing a large accumulation of avascular cartilage from the region between the proliferative and hypertrophic zones due to tibial dyschondroplasia. (Courtesy of Professor C Whitehead) © 2019 British Small Animal Veterinary Association
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20.4
(a) A normal growth plate showing the usual spatial relationship between the proliferative and hypertrophic zones. (b) A growth plate showing a large increase in the relative size of the proliferative zone as a result of a calcium/vitamin D deficiency. (c) A growth plate showing a proliferative zone of relatively normal thickness and a hypertrophic zone of increased thickness due to a phosphorus deficiency. (d) A growth plate showing a large accumulation of avascular cartilage from the region between the proliferative and hypertrophic zones due to tibial dyschondroplasia. (Courtesy of Professor C Whitehead)
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20.5
A chick with encephalomalacia (‘crazy chick disease’) showing abnormal head twisting as a result of a vitamin E deficiency. (© UK Crown) © 2019 British Small Animal Veterinary Association
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20.5
A chick with encephalomalacia (‘crazy chick disease’) showing abnormal head twisting as a result of a vitamin E deficiency. (© UK Crown)