EQUINE%20NUTRITION

EQUINE%20NUTRITION - BASIC EQUINE NUTRITION AN S 216 THE...

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BASIC EQUINE NUTRITION AN S 216
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THE HORSE NON RUMINANT HERBIVORE Large Cecum and Colon Bacterial population great enough to be able to digest large amounts of fiber Similar to: rabbit and guinea pig
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PARTS – THE HORSE’S DIGESTIVE SYSTEM MOUTH ESOPHAGUS FOREGUT STOMACH SMALL INTESTINE DUODENUM JEJUNUM ILEUM HINDGUT CECUM LARGE COLON SMALL COLON RECTUM
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MOUTH Initiates breakdown of feeds Mastication Salivary secretions Parotid gland Only during eating/chewing 10 gallon/d Teeth Incisors used for apprehension Chew in a sideways circular motion using cheek teeth to grind food Leads to sharp hooks on the lateral side of upper cheek teeth and medial side of lower cheek teeth
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ESOPHAGUS 50-60 inches long Sphincter muscle at bottom Cannot vomit Digestive upset = colic Choke Any obstruction Fast eaters Reduce risk by slowing intake
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FOREGUT - STOMACH 10% of tract (holds 2-4 gallon) Limited digestion Partial feed breakdown Some starch and protein digestion Rapid rate of passage Liquids – 75% in 30 min Dry matter – 25% in 30 min, 98% in 12 hr Continuous feeders, stomach never empties Common problem Gastric ulcers Cause – stress, anti-inflammatory drugs Signs – colic, depression, lie on back, salivate
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FOREGUT – SMALL INTESTINE 30% of tract 50-70 ft long, 3-4 in in diameter, holds 10-12 gallon Digestion Starch 65-75% Protein, AA’s 60-70% Fat 90% Ca absorption 95-99% Phosphorous 20-25%
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FOREGUT – SMALL INTESTINE 3 sections Duodenum Jejunum Ileum Gall bladder None!! Bile – secreted from liver Rate of passage Liquids, 2-8 hr Solids, quickly
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HINDGUT - CECUM A blind pouch at the junction of the sm. intestine and colon. 16% of tract 3-4 ft long, holds 7-8 gallon capacity Contents mostly liquid, 6-10% DM Digestion Similar bacterial organism to cattle rumen Much of the fiber 50% of the soluble CHO => fatty acids Slow rate of passage
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CECUM CONT. Digestion Cont microbes will produce vitamin K, B-complex vitamins, proteins, and VFA’s Vitamins and fatty acids will be absorbed, but little if any protein will be absorbed
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HINDGUT – LARGE COLON 40-50% of tract 10-12 ft long, 8-10 in diameter, 14-16 gallon capacity 5 major parts Right ventral colon Sternal flexure Left ventral colon Pelvic flexure Right dorsal colon Diaphramatic flexure Left dorsal colon Descending colon
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LARGE COLON Absorption Water VFA AA ½ Phosphorous NaCl
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HINDGUT – SMALL COLON 10 ft long, 3-4 in diameter, 5 gallon capacity Absorption Water Fecal ball formation RECTUM 1 foot long Holds waste material
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EQUINE%20NUTRITION - BASIC EQUINE NUTRITION AN S 216 THE...

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