scholarly journals Lower Gut Contents and Defecatory Responses of Broiler Chickens as Affected by Feed Withdrawal and Electrical Treatment at Slaughter

1989 ◽  
Vol 68 (11) ◽  
pp. 1478-1484 ◽  
Author(s):  
C.M. PAPA ◽  
J.A. DICKENS
Keyword(s):  
Broiler Chickens ◽  
Gut Contents ◽  
Electrical Treatment ◽  
Feed Withdrawal

COMPARISON OF FEED WITHDRAWAL TIME AND PASSAGE OF GUT CONTENTS IN BROILER CHICKENS HELD IN CRATES OR LITTER PENS

1979 ◽  
Vol 59 (1) ◽  
pp. 63-66 ◽  
Author(s):  
J. D. SUMMERS ◽  
S. LEESON
Keyword(s):  
Water Uptake ◽  
Broiler Chickens ◽  
Alimentary Tract ◽  
Gut Contents ◽  
Withdrawal Time ◽  
Running Water ◽  
Feed Withdrawal ◽  
Access To Water ◽  
Ad Libitum ◽  
Pass Through

In two experiments, individually weighed male broiler chickens were held without feed in either conventional transporting crates or litter floor pens. These latter birds received water ad libitum and were given constant light. At regular intervals, 12 of the crated or 10 of the penned birds were killed and the section of the proximal alimentary tract containing feed residue recorded. Carcass yield and water uptake after 2 h immersion in running water at 4 °C was also recorded. Feed residue did not pass through the tract of birds held in crates, since approximately 70% of these birds had feed in their gizzard after 16 h. Holding in pens resulted in a progressive emptying of the gut, such that after 12 h the upper tract was evacuated. Less shrink was observed for birds held in pens, which might be explained by the birds having access to water. It is concluded that the alimentary tract of birds cannot effectively be cleared of feed when birds are held in crates. Thus the time birds spend in transport should not be included in calculating time of feed withdrawal.

scholarly journals Reduction of Salmonella in the crop of broiler chickens subjected to feed withdrawal

2000 ◽  
Vol 79 (11) ◽  
pp. 1566-1570 ◽  
Author(s):  
A. Hinton ◽  
R.J. Buhr ◽  
K.D. Ingram
Keyword(s):  
Broiler Chickens ◽  
Feed Withdrawal

scholarly journals Effect of feed withdrawal on the incidence of Salmonella in the crops and ceca of market age broiler chickens

1997 ◽  
Vol 76 (4) ◽  
pp. 654-656 ◽  
Author(s):  
GA Ramirez ◽  
LL Sarlin ◽  
DJ Caldwell ◽  
CR Yezak ◽  
ME Hume ◽  
...  
Keyword(s):  
Broiler Chickens ◽  
Feed Withdrawal

Effect of pre-slaughter overnight feed withdrawal on pig carcass and muscle quality

2001 ◽  
Vol 81 (1) ◽  
pp. 89-97 ◽  
Author(s):  
A. Murray ◽  
W. Robertson ◽  
F. Nattress ◽  
A. Fortin
Keyword(s):  
Gastrointestinal Tract ◽  
Muscle Quality ◽  
Gut Contents ◽  
Skin Damage ◽  
Carcass Yield ◽  
Protein Levels ◽  
Feed Withdrawal ◽  
Body Component ◽  
Gut Fill ◽  
Carcass Contamination

The effects of three feed withdrawal treatments (unfasted, 15 h overnight fast at the abattoir, 15 h overnight fast at the piggery) and three additional abattoir lairage times (0–1, 2–3 or 4–5 h) on pig carcass and non-carcass body component yields and on muscle quality characteristics were evaluated. Liveweight yield was lower (P < 0.05) for pigs fasted in the abattoir (by 17 g kg–1) and the piggery (by 22 g kg–1) than for unfasted pigs given a 2–5 h abattoir lairage. Of this decrease, 40–50% was attributed to a lower carcass yield, while the remainder was attributed to a decrease in yield of non-carcass components, especially the gastrointestinal tract. Feed withdrawal decreased (P < 0.05) the amount of distension of the intestinal tract, and increased (P < 0.05) the amount of carcass skin damage due to fighting. It had no effect (P > 0.05) on carcass lean yield, amount of shrink during the chilling process, yield of wholesale cuts, yields of dissected lean, fat and bone in the wholesale cuts, or moisture, fat and protein levels in the longissimus thoracis (LT) muscle. The overnight fast had little impact on LT muscle quality with the exception of slight darkening of the colour of muscles of pigs from which feed was withdrawn at the piggery. Feed withdrawal has the potential to reduce the problem of disposal of gut contents and the risk of carcass contamination as a result of nicking the gastrointestinal tract, and to slightly darken muscle tissue without affecting other meat quality traits. These benefits must be balanced against a decreased carcass yield and an increase in skin damage due to fighting. Key words: Feed restriction, fasting, gastrointestinal tract, gut fill, carcass yield, pork quality

Caprylic Acid Reduces Enteric Campylobacter Colonization in Market-Aged Broiler Chickens but Does Not Appear To Alter Cecal Microbial Populations†

2010 ◽  
Vol 73 (2) ◽  
pp. 251-257 ◽  
Author(s):  
FAUSTO SOLÍS de los SANTOS ◽  
MICHAEL HUME ◽  
KUMAR VENKITANARAYANAN ◽  
ANN M. DONOGHUE ◽  
IRENE HANNING ◽  
...  
Keyword(s):  
Gel Electrophoresis ◽  
Caprylic Acid ◽  
Broiler Chickens ◽  
Denaturing Gradient Gel Electrophoresis ◽  
Day Treatment ◽  
The United States ◽  
Microbial Populations ◽  
Feed Withdrawal ◽  
Gradient Gel Electrophoresis ◽  
Positive Controls

Campylobacter is a leading cause of foodborne illness in the United States, and epidemiological evidence indicates poultry products to be a significant source of human Campylobacter infections. Caprylic acid, an eight-carbon medium-chain fatty acid, reduces Campylobacter colonization in chickens. How caprylic acid reduces Campylobacter carriage may be related to changes in intestinal microflora. To evaluate this possibility, cecal microbial populations were evaluated with denaturing gradient gel electrophoresis from market-age broiler chickens fed caprylic acid. In the first trial, chicks (n = 40 per trial) were assigned to four treatment groups (n = 10 birds per treatment group): positive controls (Campylobacter, no caprylic acid), with or without a 12-h feed withdrawal before slaughter; and 0.7% caprylic acid supplemented in feed for the last 3 days of the trial, with or without a 12-h feed withdrawal before slaughter. Treatments were similar for trial 2, except caprylic acid was supplemented for the last 7 days of the trial. At age 14 days, chicks were orally challenged with Campylobacter jejuni, and on day 42, ceca were collected for denaturing gradient gel electrophoresis and Campylobacter analysis. Caprylic acid supplemented for 3 or 7 days at 0.7% reduced Campylobacter compared with the positive controls, except for the 7-day treatment with a 12-h feed withdrawal period. Denaturing gradient gel electrophoresis profiles of the cecal content showed very limited differences in microbial populations. The results of this study indicate that caprylic acid's ability to reduce Campylobacter does not appear to be due to changes in cecal microflora.

Effects of stocking density and daily feed withdrawal periods on the performance of broiler chickens in a semi-arid environment

2016 ◽  
Vol 48 (8) ◽  
pp. 1547-1554 ◽  
Author(s):  
Mashudu Daniel Rambau ◽  
Mulanga Lenticia Mudau ◽  
Sibusiso David Makhanya ◽  
Kow Benyi
Keyword(s):  
Broiler Chickens ◽  
Stocking Density ◽  
Arid Environment ◽  
Feed Withdrawal ◽  
Semi Arid
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