"عسى أن تكون علما ينتفع به" Stress free early chick management

1. Release Genetic Performance Potential
Part 2
Stress-Free Early Management
Part2

2. Plan of Talk – Part 2
 Overheating during transport
 Overheating in the first 12-48 hours of brooding
 Chilling in the first 12-48 hours of brooding
 Culling
 How do I know when my chicks are in the thermo neutral
zone?

3. Plan of Talk – Part 2
 Overheating during transport
 Overheating in the first 12-48 hours of brooding
 Chilling in the first 12-48 hours of brooding
 Culling
 How do I know when my chicks are in the thermo neutral
zone?

4. Overheating During Transport
The air temperature within the basket of
chicks will be higher than the surrounding
air temperature.

5. Overheating During Transport
 One hundred 40-gram chicks at 32.2°C will produce 165 BTUs
(British Thermal Unit BTU) per hour.
 If the air circulation stops, the temperature within the basket
will rise 0.75°C per minute resulting in an ambient
temperature around the chicks of 40°C in about 10 minutes.

6. Plan of Talk – Part 2
 Overheating during transport
 Overheating in the first 12-48 hours of brooding
 Chilling in the first 12-48 hours of brooding
 Culling
 How do I know when my chicks are in the thermo neutral
zone?

7. - Reduced growth rate to 16 days.
- The weight difference never be compensated again!
40 °C1 hr
Over Heating
in the First 12-48 Hours of Brooding

8. - Reduced feed intake for 14 days.
- Increased mortality
>35°C
1st 48
hrs
Cont. …

9. Plan of Talk – Part 2
 Overheating during transport
 Overheating in the first 12-48 hours of brooding
 Chilling in the first 12-48 hours of brooding
 Culling
 How do I know when my chicks are in the thermo neutral
zone?

10. Chilling
in the First 12-48 Hours of Brooding
 Chicks do not have the ability to control their body
temperature completely until they are 2 weeks old.
 Smaller chicks from young flocks have more trouble
controlling body temperature than larger chicks, they will be
the easiest to chill.
 Warm temperatures must be held longer to achieve maximum
survival and performance.

11. Floor Temperature
 Floor temperature is more critical to chicks.
 Floor temperature and insulation will be more important to
chicks during this time than the air temperature.
 Floor temperature in the area of the feed and water should be
32-33°C at placement.
 Insulation from the cold and condensation inherent with
concrete flooring is also essential.
 At least 5 to 7 cm of fluffy dry litter material is needed.

12. Cont. …
 Litter with a tendency to mat and hold moisture at the surface
should be avoided.
 Thin floor coverage may be adequate for summer brooding,
but doesn't provide enough protection from cold concrete
and moisture in the cooler seasons.

13. Chilling
In The First 12-48 Hours Of Brooding
 Students at the University of Georgia submitted chicks to
12.8°C for 45 minutes.
 At 35 days of age, the live weight of the cold-stressed chicks was 0.11
kg less than the normally brooded controls.
 Increased metabolism required to meet the demand for heat
production in a chilled chick requires increased oxygen.
 The heart works harder to meet this need, predisposing the
chick to ascites later on.

14. Plan of Talk – Part 2
 Overheating during transport
 Overheating in the first 12-48 hours of brooding
 Chilling in the first 12-48 hours of brooding
 Culling
 How do I know when my chicks are in the thermo neutral
zone?

15. Culling
 Avoid culling before day 7, especially in flocks composed of
chicks from young breeders, mixed breeder sources or split
placements.
 Give chicks an opportunity to start.
 By day 7, however, poor chicks should be obvious.
 These struggling chicks will serve as an infection source and as
a drain on feed and floor space.
 No amount of medication will fix this chicks.
 Cull them from the flock.

16. Plan of Talk – Part 2
 Overheating during transport
 Overheating in the first 12-48 hours of brooding
 Chilling in the first 12-48 hours of brooding
 Culling
 How do I know when my chicks are in the thermo neutral
zone?

17. How Do I Know When My Chicks Are
In The thermo neutral Zone?
The only way to know for certain is to take rectal temperatures
of chicks throughout the house (at least 3 locations).

18. Less than 40°C.
Cold
 Chick will be less active.
 Chick has cold feet.
 Chicks may huddle or bunch around the heat source or in feed
lids.

19. 40°C
Struggling
 Chick has cold feet.
 These chicks may be more difficult to pick out of the group
without actually taking temperatures.
 Struggling chicks are diverting energy that should be used for
growth and development to temperature maintenance.

20. 40-40.8°C.
Comfortable
 Chicks will spread out, eating and drinking.
 The chicks have warm feet.

21. Over 41.1°c
Hot
 Chick is panting
 During transport, the chicks cannot move out of their
uncomfortable environment, panting is their only option.
 In the houses, a chirping distress sound may occasionally be
heard.
 Chicks move away from the heat source and line up along the
wall.

22. Cont. …
Taking rectal temperatures is
needed to discover and correct
overheating problems in the
holding area or during chick
transport to the farm.