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http://cahfs.ucdavis.edu/annual_reports/2004ar.pdf
VITAMIN B2 (RIBOFLAVIN) DEFICIENCY IN CHICKENS
Riboflavin (Vitamin B2) is a water-soluble vitamin and a cofactor for various enzymes in many systems of the body. Some of the cofactors are important in the oxidation-reduction reactions involved in cell respiration. Riboflavin deficiency is most commonly reported in chickens but it also has been reported in turkeys and pigeons. Deficiency of riboflavin in chickens can cause peripheral neuropathy, resulting in a condition called "curled-toe paralysis." Other clinical signs due to riboflavin deficiency include weakness, slow growth, loss of weight, leg paralysis without curled-toes and walking on hocks with the aid of their wings. Riboflavin deficiency in the hen can result in decreased egg production, increased embryonic mortality and poor hatchability. Among various nutritional deficiencies, chickens are most sensitive to riboflavin deficiency. ...........................Clinical signs in the chickens included paralysis, walking on hocks and occasionally walking on their wings. The incidence of clinical signs in various flocks ranged from 20 percent in one flock to 40 percent in another. Other signs included splayed legs, abnormal droppings,uneven size of birds and increased mortality. Gross lesions included curled-toes in most submissions but distinctly absent in a few. The sciatic nerves were pale yellow, edematous and mild to moderately enlarged with a loss of cross striations. Long bones were soft in birds from several submissions. Microscopic examination of the peripheral nerves revealed axonal degeneration, interstitial edema and proliferation of mononuclear cells and infiltration of lymphocytes.
Analysis of several feed samples for riboflavin revealed levels ranging from 1.1 mg/kg to 2.4 mg/kg of feed. Normal requirement of riboflavin for broiler chickens ranges from 4.6 mg/kg to 5.0 mg/kg of feed. Prompt supplementation of birds with multiple vitamins resulted in dramatic reduction in clinical signs for most birds."
Whenever you see leg problems in birds you should always give a (complete) B vitamin supplement... POLYVISOL lacks B-1 but in this case (B-2) is a good source ... be sure to give breeder birds a complete supplement in their feed to avoid possible problems.
http://cahfs.ucdavis.edu/annual_reports/2004ar.pdf
VITAMIN B2 (RIBOFLAVIN) DEFICIENCY IN CHICKENS
Riboflavin (Vitamin B2) is a water-soluble vitamin and a cofactor for various enzymes in many systems of the body. Some of the cofactors are important in the oxidation-reduction reactions involved in cell respiration. Riboflavin deficiency is most commonly reported in chickens but it also has been reported in turkeys and pigeons. Deficiency of riboflavin in chickens can cause peripheral neuropathy, resulting in a condition called "curled-toe paralysis." Other clinical signs due to riboflavin deficiency include weakness, slow growth, loss of weight, leg paralysis without curled-toes and walking on hocks with the aid of their wings. Riboflavin deficiency in the hen can result in decreased egg production, increased embryonic mortality and poor hatchability. Among various nutritional deficiencies, chickens are most sensitive to riboflavin deficiency. ...........................Clinical signs in the chickens included paralysis, walking on hocks and occasionally walking on their wings. The incidence of clinical signs in various flocks ranged from 20 percent in one flock to 40 percent in another. Other signs included splayed legs, abnormal droppings,uneven size of birds and increased mortality. Gross lesions included curled-toes in most submissions but distinctly absent in a few. The sciatic nerves were pale yellow, edematous and mild to moderately enlarged with a loss of cross striations. Long bones were soft in birds from several submissions. Microscopic examination of the peripheral nerves revealed axonal degeneration, interstitial edema and proliferation of mononuclear cells and infiltration of lymphocytes.
Analysis of several feed samples for riboflavin revealed levels ranging from 1.1 mg/kg to 2.4 mg/kg of feed. Normal requirement of riboflavin for broiler chickens ranges from 4.6 mg/kg to 5.0 mg/kg of feed. Prompt supplementation of birds with multiple vitamins resulted in dramatic reduction in clinical signs for most birds."
Whenever you see leg problems in birds you should always give a (complete) B vitamin supplement... POLYVISOL lacks B-1 but in this case (B-2) is a good source ... be sure to give breeder birds a complete supplement in their feed to avoid possible problems.
