Water Supply Deprivation or Acciden ...

Water Supply Deprivation or Accidental 24-48 hours Cut in Laying Hens

Water Supply Deprivation or Accidental 24-48 hours Cut in Laying Hens

Laying hens need a constant water supply or production will drop. Usually, the mobility of the flock decreases and birds may show signs of depression and weight loss. (1, 2, 5)

The effect of an accidental 48-hour cut in water supply in laying hens production dropped very quickly to virtually 0%.  Most birds that resumed production within 28 days achieved normal output for the age and there was an indication of improved shell quality. (1, 2, 5)

Production may drop as much as 30% when hens are deprived of water for 24 hours, and it may take as long as 25 to 30 days before production returns to normal (1, 2, 5)

In older hens, excessive water restriction may limit the amount of feed ingested (3)

The effect of an accidental 48-hour cut in water supply to layers production dropped off very quickly to virtual 0%, although interestingly, a few birds maintain normal production. Most birds that resumed production within 28 days achieved normal output for their age and then is an indication of improved shell quality. (1, 2, 5)

Water is often taken for granted, and yet it is probably the most essential nutrient. Water is by far the single greatest constituent of the body, and, in general, represents about 70% of total body weight. Access to water is very important, and a lack of it for several hours will probably cause a decline in egg production. Hens are more sensitive to a lack of water than a lack of feed. (1, 2, 5)

The amount of water needed depends on environmental temperature and relative humidity, diet composition and rate of egg production. It has been generally assumed that birds drink approximately twice as much water as the amount of feed consumed on a weight basis, but water intake varies greatly, especially in hot weather. (1, 2, 5)

Intentional water deprivation is a part of a program to initiate a molt. Today, many countries forbid this practice. (1, 2, 5)

Observed Clinical Signs Happenings

Egg drop

  • Egg production declines rapidly
  • Production dropped very quickly
  • Hens are deprived of water for 24 hours, and it may take as long as 25 to 30 days before production returns to normal

Visibly sick birds

  • Many visibly sick birds show signs of depression

Flock behaviour

  • Decreased flock mobility or activity

Body Parts

  • Weight loss or weight depression

Feed Consumption Changes

  • Feed intake reduced
  • A marked drop in feed intake

Shell quality

  • Thin-shelled and soft-shelled or porous eggs
  • Egg specific gravity score lower (should be above 1.080 (1.068 thin shells)
  • Ungraded or second's eggs increased

Water Supply Deprivation or Accidental 48-hours Cut in Laying Hens DOES NOT show, exhibit, or manifest any of the following clinical signs happenings:

  • Egg production drops gradually
  • Mortality above the standard
  • Few visibly sick birds
  • Increase flock mobility or activity
  • Droppings abnormalities
  • Respiratory abnormalities
  • Neurological Nervous
  • Lameness or unusual movements, incoordination, reluctance to move
  • Eyes abnormalities
  • Head, Comb, Wattles, Face, Nostrils, Sinuses, Mount, Beak, Earlobes, abnormalities (except eyes)
  • Feathers abnormalities
  • Feed intake increased
  • Diet or Feed Changes (Recent Feed delivery, Recent formulation /diet, Other silo or improper storage, another feed brand)
  • Internal Egg quality
Causing Agents
Cut of water supply accidentally. A deterring factor in water
Affected Systems/Organs
Whole Body, Kidney
Spread
N/A
Mainly Affects
Liveability and Egg Production
Solution
Water supply immediately
Suggested Actions
  • Can be confirmed with clinical signs and gross lesions
  • Can be dealt with in house
  • Technical assistance recommended

Impact on Egg quality

0

Impact on Liveability

3


Impact on Production

3

Overall Economic Impact

3



  1. Y.M. Saif.2008.Disease of Poultry. 12th Edition. page 1150
  2. David E. Swayne. 2013. Diseases of Poultry 13th Edition. page 1235
  3. Mark Pattison, Paul F. McMullin, Janet M. Bradbury. Dennis J. Alexander. 2008. Poultry Diseases. 6th Edition. Page 538
  4. Paul McMullin. 2004. A Pocket Guide to Poultry Health and Disease. First Edition. page
  5. Steven Leeson, John D. Summers. 2008. Commercial Poultry Nutrition. Third Edition. Page
  6. Donald D. Bell, Williams D. Weaver. 2009.  Commercial Chicken Meat and Egg Production. Fifth Edition. Page 118-119
  7. Gail Damerow 1994. The chicken Health Handbook.

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