Influence of Vitamin Deficiency and Level of Dietary Protein on the Incidence of Leg Problems in Broiler Chicks

Summers, J. D.; Shen, Huile; Leeson, S.; Julian, R. J.

doi:10.3382/ps.0631115

Cited by 14 publications

(12 citation statements)

References 12 publications

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“…However, Hester et al (1985) showed that lowering the lysine and methionine plus cystine content of diets to 90% of those recommended by the NRC did not result in a signi cant reduction in the incidence of leg abnormalities. Summers et al (1984) showed that chicks fed on a higher protein diet did not show a greater incidence of leg problems.…”

Section: Introductionmentioning

confidence: 96%

Influence of dietary protein and sex on walking ability and bone parameters of broilers

Yalçın¹,

Settar²,

Dicle³

1998

British Poultry Science

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1. The study was conducted to investigate the effect of dietary protein on the walking ability and bone parameters of broilers reared under summer temperatures which ranged from 26 degrees to 32 degrees C (+/- 2 degrees C). 2. Three different dietary protein combinations were used. The diets (per kg) were: low protein with 205 g crude protein and 12.94 MJ ME, 184 g crude protein and 12.75 MJ ME; medium protein with 219 g crude protein and 12.99 MJ ME, 201 g crude protein and 12.87 MJ ME; and high protein with 238 g crude protein and 12.99 MJ ME, 216 g crude protein and 12.96 MJ ME from 0 to 4 and 4 to 7 weeks of age, respectively. Body weights of birds were recorded and birds' walking ability (gait scoring) were scored for each bird, according to 3 categories (completely normal to immobile, at 4 and 7 weeks). Tibia parameters and tibia plateau angles were also determined at 7 weeks. 3. Birds fed on the low protein were lighter than those fed on the medium or high protein diets. At 7 weeks, birds with poor walking ability weighted 149 g less than birds with no walking difficulty. 4. Bone parameters were not affected by dietary protein, sex or gait score. There was a significantly positive correlation between bone strength and radiographic density. Bone strength was also significantly correlated with bone weight and length.

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Section: Introductionmentioning

confidence: 96%

Influence of dietary protein and sex on walking ability and bone parameters of broilers

Yalçın¹,

Settar²,

Dicle³

1998

British Poultry Science

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“…Not all studies have shown that lower protein diets decreased the incidence of leg deformities. Summers et al (1984) reported the effect of a 22 vs 30% protein diet fed from 0 to 3 weeks of age on leg problems of male broiler chicks. Although the incidence of deformed legs and mobility did not respond to the two diets in the same manner between the two experiments, Summers et al (1984) concluded that chicks fed the higher protein diet did not show a greater incidence of leg problems.…”

Section: Introductionmentioning

confidence: 98%

The Effect of Lighting, Dietary Amino Acids, and Litter on the Incidence of Leg Abnormalities and Performance of Turkey Toms

et al. 1985

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Two trials were conducted to determine the effect of light duration on the incidence of leg abnormalities and related parameters in turkey toms. A step-up lighting program was compared with a step-down regimen in which intensity was maintained at 2.5 lx for both programs. In addition to lighting, Trial 1 evaluated the effect of reduced dietary lysine and methionine plus cystine levels during the starter and grower periods, and Trial 2 investigated the effects of type (pine shavings vs. whole rice hulls) and depth (5 cm vs. 10 cm) of litter.For both trials, toms reared in the low intensity step-up lighting program had reduced body weights, poorer feed to gain ratios, consumed less feed, and were more active when compared with toms raised in the low intensity step-down lighting program. The incidence of leg abnormalities was unaffected by lighting (Trials 1 and 2), diet (Trial 1), or type and depth of litter (Trial 2). For toms of the step-up lighting program, the absolute length of the left tarsometatarsal bone was shorter, but when expressed on a ratio to body weight, the relative length was longer. Testes weights were larger in Trial 2 for toms of the step-up lighting program as compared with toms of the stepdown lighting regimen with no differences due to lighting in Trial 1. Toms fed the reduced amino acid rations in Trial 1 showed reduced body weight at 84 days of age when compared with controls; at all other ages there were no differences between dietary treatments. Type and depth of litter did not affect the performance of turkey toms. (

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“…Similarly, it is reported that the LP diets resulted in a decrease in the BW of the birds (Hurwitz et al, 1998;Yalçın et al, 1998;Faria Filho et al, 2005). Dietary protein level had no significant effect on GS as Summers et al (1984) found. Likewise, Hester et al (1985) showed that lowering the amino acid such as the lysine and methionine 1 cystine content of diets to 90% from NRC recommendation did not cause a significant reduction in the incidence of leg abnormalities.…”

Section: Discussionmentioning

confidence: 77%

Effects of meal-time feeding and protein restriction on walking ability and some bone and carcass properties in broilers

Konca

Yaylak

Önenç

2008

Animal

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This experiment was designed to investigate the effects of meal-time feeding and protein restriction on performance, gait score (GS) and carcass and bone traits in broilers. A total of 420 1-day-old chicks were wing banded and randomly distributed into 21 pens with 20 chicks each. At 7 days of age, chicks were weighed and randomly assigned to one of the three treatments: (1) control (C) feed (23.02% crude protein (CP)) was available ad libitum; (2) meal-time feeding (MF); control feed was available from 0100 to 0900 h and from 1500 to 2300 h. Food was withdrawn from 0900 to 1500 h and whole wheat (10 g/bird per day) was dispersed on the floor from 7 to 21 days; and (3) low-protein (LP) diet (19.71% CP) was fed to the chicks from 7 to 21 days. All of the groups were fed ad libitum from 1 to 7 days of age and from 21 to 45 days of age with a standard commercial diet. Individual body weight was measured on days 7, 21 and 45. Feed consumption was measured from 7 to 21 days and from 21 to 45 days. Forty-two chicks were humanly slaughtered and eviscerated for bone evaluation, on days 21 and 45. Also carcass characteristics were determined on day 45. Control group body weight was significantly higher (P , 0.05) at 21 and 45 days of age than the MF and LP groups, which did not differ. Feed intake was reduced by meal-time feeding and LP diet (P , 0.01). Feed efficiency was the best in the MF group during the period of 21 to 45 days of age (P , 0.01). In the control group, shank was significantly longer than that of the LP group and tibia breaking strength was higher than that of the MF group at 21 days (P , 0.05). However, shank width, tibia wet weight and tibia mid-diaphysis ash percentage of the MF group were significantly lower than those of the C and LP groups at 21 days of age (P , 0.05). GS, shank and carcass and tibia bone traits on day 45 were not significant among groups. No compensatory growth and walking ability improvement were observed at 45 days of age for broilers fed with MF and LP between 7 and 21 days of age.

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Influence of Vitamin Deficiency and Level of Dietary Protein on the Incidence of Leg Problems in Broiler Chicks

Cited by 14 publications

References 12 publications

Influence of dietary protein and sex on walking ability and bone parameters of broilers

Influence of dietary protein and sex on walking ability and bone parameters of broilers

The Effect of Lighting, Dietary Amino Acids, and Litter on the Incidence of Leg Abnormalities and Performance of Turkey Toms

Effects of meal-time feeding and protein restriction on walking ability and some bone and carcass properties in broilers

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