Own hatching tips - Failure check

Author:Nanchang Edward Quality Goods Factory Popularity:147 issuing time:2017-05-18
Own hatching tips - Failure check
How to locate and rectify faults in egg incubation, check the list
# Problem + Probable causes / Action
1 Too many clears or infertile eggs
(a) Wrong proportion of males to females / Check mating ratios according to breeder’s recommendations
(b) Male is undernourished / See that cockerels are able to feed separately, otherwise hens may eat all the feed
(c) Interference among males during mating / Do not use too many males; always rear breeding males together; erect temporary solid partitions between breeding pens or inside large pens
(d) Damaged combs and wattles among males / See that housing is comfortable and proper drinking fountains are provided for breeding pens
(e) Male is too old / Replace old birds
(f) Male is sterile / Replace with another male
(g) Eggs kept too long or under the wrong conditions before setting / Do not keep hatching eggs longer than seven days; store them in a cool temperature (10-l5.6°C) at relative humidity around 75-80%

2 Blood rings, which indicate very early embryonic death
(a) Incubator temperature too high or low / Check thermometers, thermostats and electricity supply; follow manufacturer’s instructions
(b) Incorrect fumigation procedure / Use the correct amount of fumigant. Do not fumigate between 24 and 96 hours after setting
(c) As in 1(g) /As in 1(g)
3 Many dead-in-shell
(a) As in 2(a) / As in 2(a)
(b) Eggs not properly turned /Turn the eggs regularly at least three to five times a day; always turn the eggs in the reverse direction each time
(c) Breeding stocks' nutrition is deficient if deaths are high in days 10 and 14 / Check that feeding is sound
(d) Incubator's ventilation faulty / Increase ventilation by normal means
(e) Infectious diseases / Use eggs only from healthy stock; check that hatchery hygiene is sound and carried out regularly

4 Piped eggs failing to hatch
(a) Insufficient moisture in the incubator / Increase the evaporating surface of water or the sprays
(b) Too much moisture at earlier stages / Check wet-bulb readings
(c) Nutrition problem (c) Check flock feeding
5 5.1 Hatching too soon (a) Incubator's temperature too high
5.2Hatching too late (b) Incubator's temperature too low
5.3 Sticky chicks (c) Incubator's temperature probably too high
(a) (b) (c) / Ensure the temperature regulating gear is working and set at the correct operating temperature when the control switches off

6 Malformed chicks
(a) Incubator's temperature too high / As in 2(a)
(b) Incubator's temperature too low / As in 2(a)
(c) Eggs set incorrectly or not properly turned after setting / As in 3(b); also, take care to set the eggs broad-end up;
7 Spraddling chicks Hatching trays too smooth / use wire-meshed tray floors or cover slippery floors with burlap or other similar material
8 Weak chick
(a) Incubator or hatching unit overheating / As in 5
(b) Setting small eggs / Only set eggs of the breed average size
Small chick
(c) Too little moisture in incubator / As in 4
(d) Too much fumigant left in hatcher / As in 2(b)
Heavy breathing chicks
(e) Too much moisture in hatcher / As in 4
(f) Possibly infectious disease / Send chicks to a veterinary laboratory for diagnosis
(g) Low average temperature during period of incubation / As in 2(a)
Mushy chicks
(h) Incubator has poor ventilation / Omphalitis (navel infection)
(h) As in 3(d) / Carefully clean out and fumigate the incubator using formaldehyde at the higher strength; disinfect all equipment;
9 Hatch not coming off evenly Setting eggs too diverse in age or size,
/set eggs at least once a week and never retain hatching eggs longer than 10 days before setting; incubate only average-size eggs.
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