Layer and Broiler Management Flashcards
objective of layer enterprise
obtain max # of saleable eggs per hen housed at low feed cost per egg or per kg egg mass and the eggs should have optimal internal and external qualities
males are considered unwanted by products of layer industry
true or false
true
chick sexing is used for?
identifying sex of chicks
types of chick sexing
- auto-sexing
- vent sexing
- feather sexing
in vent sexing, the producer checks for the absence/presence of ?
rudimentary male sex organ
in feather sexing, sex is identified through the difference in their feathers
true or false
true
where do male chicks go?
- chick meal (euthanized then is fed)
- fiestas (colored chicks)
as the bird matures, the hen-day egg production __________ (increases/decreases)
decreases
as the bird matures, weight of eggs __________ (increases/decreases)
increases
as the bird matures, body weight of layers increases
true or false
false; it just remains constant
define molting
periodic shredding and replacement of feathers
induced molting is done when economic circumstances arise which are?
- anticipation of high egg prices
- lack of available cash
- empty laying houses
methods of molting
- conventional
- alternative
in conventional method of molting, what are reduced?
- feed, water, or both
- photoperiod
in alternative method of molting, zinc can be decreases to induce molting
true or false
false; it should be increased
in alternative method of molting, lower Ca and Na induces molting
true or false
true
in culling, these are observed in judging layers
- comb and eyes
- vent
- pelvic spread
- abdomen
in judging layers, the vent, pelvic spread, and abdomen can give indications on
a. reproductive capacity and hen’s current reprod rate
b. health and vigor of birds
A
in judging layers, the comb and wattle can give indications on
a. reproductive capacity and hen’s current reprod rate
b. health and vigor of birds
B
in judging a layer’s comb, it should be small, pale, and scaly
true or false
false; it should be large, red, full, and glossy
a good layer has ______ (bright/dull) eyes
bright
a poor layer has a large, dilated, oblong, and moist vent
true or false
false; that’s a good layer
poor layers have small, contracted, round and dry vent
true or false
true
pelvic bone spread of a good layer should be about___________ fingers
2 or more
a hard abdominal bone spread that’s three or more than 3 fingers is preferred for a good layer
true or false
false; it should be soft
hen-housed egg production reflects production capacity of the available birds
true or false
false; it’s the hen-day egg production
an __% or more per year for hen-day egg prod is desirable
85%
