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14 . Trouble Shooting Failures With Egg Incubation

When incubation of eggs fails, indications are often available that a well trained professional uses for diagnosing the causes for failure. The information listed below includes the more common symptoms for incubation failures, the causes for each symptom, and the recommended corrective measures

Symptoms of incubation/breeder management problems include:
1)  Clear eggs with no visible embryonic development.
2)  Blood rings in incubated eggs.
3)  Many dead embryos at an early stage.
4)  Chicks fully formed, but dead without pipping.
5)  Pipped eggs, but died without hatching.
6)  Early hatching (may have bloody navels).
7)  Late hatching or not hatching uniformly.
8)  Sticky embryos.
9)  Embryos sticking or adhering to shell.
10)  Crippled and malformed chicks.
11)  Abnormal, weak, or small chicks.
12)  Chicks with labored breathing.
13)  Large, soft-bodied mushy chicks; dead on trays; bad odor.
14)  Rough or unhealed navels on chicks
15)  Gasping Chicks.
16)  Delayed hatch; eggs do not starting to pip until 21st day or later
17)  Draggy hatch, some chicks early
18)  Short down on chicks.
19)  Excessive yellow down color.
 
Symptom  1 :- Clear Eggs with no embryonic development (infertile).
Problem Cause Corrective Measures
Males undernourished
Follow a recommended feeding program to provide adequate nutrition. Replace underweight males with vigorous ones
Too few males Increase the number of males in the flock.
Seasonal decline in fertility Use young cockerels more resistant to environmental stress.
Seasonal decline in fertility Use young cockerels more resistant to environmental stress.
Competition among breeding males Do not use too many males. Rear all males together. Place temporary partitions within large pens.
Diseased flock Conduct an approved disease control program.
Frozen combs and wattles Provide comfortable housing. Properly select and maintain drinking fountains.
Old males Replace with younger males.
Selected mating in pens Artificially inseminate infertile hens. Replace males in the pen/house.
Male sterility Replace males in the pen/house.
Crowded breeders Provide recommended floor space, at least 3 ft²/bird.
Improper artificial insemination techniques or use of old/over-diluted semen. Follow recommendations of primary breeder company.
Eggs damaged by environment Gather eggs frequently (at least once daily).
Eggs stored too long or incorrectly Store eggs at 50-60 degrees F. and 60% relative humidity. Incubate eggs within 7 days of lay.
 
Symptom   2:- Blood rings in incubated Eggs.
Problem Cause Corrective Measures
Improper storage Follow recommended egg storage and gathering recommendations.
Improper incubation temperatures Check thermometer accuracy and incubator functions. Follow recommended temperature settings.
Improper breeder nutrition Feed breeders a diet with balanced nutrient levels.
Improper fumigation Follow fumigation recommendations.
 
Symptom  3:- Many dead embryos at early stages.
Problem Cause Corrective Measures
Improper incubation temperatures (usually too high) Check accuracy of thermometer. Follow recommended incubation temperatures.
Improper egg turning Turn eggs at regular intervals.
Inherited low hatchability Avoid cross breeding. May need to secure different breeding stock.
Improper ventilation/ Lack of ventilation Increase ventilation rate in incubator and/or room, but avoid drafts. /Provide adequate ventilation of the incubator and Check for openings of incubator rota  vents.
Pull rum disease or other salmonellae's Use eggs from disease-free sources. Have your representative’s blood-test the breeder flock.
Improper nutrition of breeders Provide a well-balanced nutritional diet to breeders.
 
Symptom  4:- Chicks fully formed, but dead without pepping.
Problem Cause Corrective Measures
Low Average Humidity in Incubator, too low or too high humidity at transfer time in the Hatcher Maintain proper humidity levels through out incubation & hatching cycle.
 
Symptom  5:- Pipped eggs, but died without hatching.
Problem Cause Corrective Measures
Low average humidity. Maintain proper humidity levels through out incubation & hatching cycle.
Inadequate ventilation or excessive fumigation during course of hatch. Provide adequate ventilated room & proper openings of rota vents of the machine.
Low average. Maintain proper temperature throughout incubating & hatching cycle.
 
Symptom  6:- Early hatching (may have bloody navels).
Problem Cause Corrective Measures
High incubation temperatures. Follow recommended incubation temperatures. Check equipment for proper function. Guard against electrical surges or high incubator room temperatures.
Improper egg storage. Store eggs at 50-60 degrees F. and 60% R.H. Turn at least 3 times daily.
 
Symptom  7:-  Late hatching or not hatching uniformly.
Problem Cause Corrective Measures
Low incubation temperatures. Follow recommended incubation temperatures.
Old or improperly stored eggs. Gather eggs frequently, cool immediately and store eggs properly. Do not store longer than 7 days.
 
Symptom  8:- Sticky embryos (embryos may be smeared with egg contents).
Problem Cause Corrective Measures
High average incubation humidity. Follow recommended incubation humidity. Maintain proper humidity levels through out incubation & hatching cycle.
Low incubation temperature. Follow recommended temperature settings.
Lethal genes. Avoid cross breeding. May need to secure different breeding stock.
Inadequate ventilation excessive fumigation  during course of hatch. Provide adequate ventilated room & proper openings of rota vents of machine. Follow recommended instructions regarding fumigation.
 
Symptom  9:-  Embryos sticking or adhering to shell.
Problem Cause Corrective Measures
Low incubation humidity (especially during hatching). Increase incubation humidity by increasing water evaporation. Embryos dried too much.
Excessive ventilation rate. Reduce ventilation rate but maintain minimum air exchange to prevent suffocation of embryos.
 
 
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