Analyzing poor hatchability
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This document lists various hatching issues observed in eggs and chicks and possible causes for each issue. Some common causes mentioned include bacterial contamination, improper incubation temperatures or humidity levels, disease or stress in breeder flocks, inadequate ventilation or turning of eggs, and issues with the incubator itself. The document provides detailed potential reasons for a wide range of problems that can occur at different stages of incubation and hatching.
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Analyzing poor hatchability
- 2. Observation Possible Causes Eggs exploding Bacterial contamination of eggs Dirty eggs Improperly washed eggs Incubator infection Cleareggs Infertile Eggsheld improperly Too much egg fumigation Very early embryonic mortality Analyzing poor hatchability
- 3. Conti… Bloodring (embryonic death, 2-4 days) Hereditary Diseased breeding flock Old eggs Rough handling of hatching eggs Electric power failure Eggsnot turned Incubating temperaturetoo high Incubating temperaturetoo low
- 5. Conti… Dead embryos second week of incubation Inadequatebreeder ration Diseasein breeder flock Eggsnot cooled prior to incubation Temperaturetoo high in incubator Temperaturetoo low in incubator Too much CO2 in air (inadequateventilation)
- 6. Conti… Aircell too small Inadequatebreeder ration Largeeggs Humidity too high, 1 to 19 days Aircell too large Small eggs Humidity too low, 1 to 19 days Chicks hatch early Small eggs Leghorn eggsversusmeat-typeeggs Incorrect thermometer Temperatureto high, 1 to 19 days Humidity too low, 1 to 10 days
- 7. Conti… Chicks hatch late Variableroom temperature Largeeggs Old eggs Incorrect thermometer Temperatureto low, 1 to 19 days Humidity too high, 1 to 19 days Temperaturetoo low in hatcher Fully developed embryo with beak no in aircell Inadequatebreeder ration Temperaturetoo high, 1 to 10 days Humidity too high, nineteenth day
- 8. Conti.. Fully developed embryo with beak in aircell Inadequatebreeder ration Incubator air circulation poor Temperaturetoo high, 20 to 21 days Humidity to high, 20 to 21 days Chicks pipping early Temperaturetoo high, 1 to 19 days Humidity too low, 1 to 19 days
- 9. Conti.. Chicks dead afterpipping shell Inadequatebreeder ration Diseasein breeder flock Eggsincubated small end up Eggsnot turned first 2 weeks Eggstransferred too late Inadequateair circulation, 20 to 21 days CO2 content of air too high, 20 to 21 days Incorrect temperature, 1 to 19 days Temperaturetoo high, 20 to 21 days Humidity too low, 20 to 21 days Thin-shelled eggs & Lethal genes
- 10. Conti… Malpositions Inadequatebreeder ration Eggsset small end up Odd-shaped eggsset Inadequateturning Sticky chicks (albumen sticking to chicks) Eggstransferred too late Temperaturetoo high, 20 to 21 days Humidity too low, 20 to 21 days Down collectorsnot adequate
- 11. Conti… Sticky chicks (albumen sticking to down) Old eggs Air speed too slow, 20 21 days Inadequateair in incubator Temperaturetoo high, 20 to 21 days Humidity too high, 20 to 21 days Down collection not adequate Chicks too large Largeeggs Humidity too high, 1 to 19 days
- 12. Conti… Chicks too small Eggsproduced in hot weather Small eggs Thin, porousegg shells Humidity too low, 1 to 19 days Trays not uniform in hatch orchick quality Eggsfrom different breeds Eggsof different sizes Eggsof different ageswhen set Diseaseor stressin somebreeder flocks Inadequateincubator air circulation
- 13. Conti… Soft chicks Unsanitary incubator conditions Temperaturetoo low, 1 to 19 days Humidity too high, 20 to 21 days Chicks dehydrated Eggsset too early Humidity too low, 20 to 21 days Chicksleft in hatcher too long after hatching completed Mushy chicks Unsanitary incubator conditions
- 14. Contii.. Unhealed navel, dry Inadequatebreeder ration Temperaturetoo low, 20 to 21 days Widetemperaturevariationsin incubator Humidity too high, 20 to 21 days Humidity not lowered after hatching completed Unhealed navel, wet, and odorous Omphalitis Unsanitary hatchery and incubators
- 15. Conti… Chicks cannot stand Breeder ration inadequate Improper temperature, 1 to 21 days Humidity too high, 1 to 19 days Inadequateventilation, 1 to 21 days Crippled chicks Inadequatebreeder ration Variation in temperature, 1 to 21 days Malpositions
- 16. Conti.. Crooked roes Inadequatebreeder ration Improper temperature, 1 to 21 days Spaddle legs Hatchery traystoo smooth Short down Inadequatebreeder ration High temperature, 1 to 10 days
- 17. Conti.. Closed eyes Temperaturetoo high, 20 to 21 days Humidity too low, 20 to 21 days Loosedown in hatcher Down collectorsnot adequate