E. CULLING Flashcards
-opposite of selection
CULLING
9 POINTERS IN CULLING:
- REPRODUCTIVE FAILURES
- POOR MATERNAL INSTINCTS
- POOR MILKERS
- FEET AND LEG PROBLEM
- POOR LITTER SIZE
- LONG DRY PERIOD
- DAMAGED UDDER SECTION
- DISEASE
- ABNORMALITIES
some gilts and sows do not come into heat despite proper feeding and management:
REPRODUCTIVE FAILURES
ex.
hydrosalpinx
pyosalpinx
unilateral blind uterine horn
oviduct distened w/ fluid
HYDROSALPINX
ovidcut distened w/ pus-like
PYOSALPINX
cystic ovaries , blind uterine body
UNILATERAL BLIND UTERINE HORN
some sows have cannibalistic tendency durimg & after farrowing esp. first farrowed :
POOR MATERNAL INSTINCTS
sow must be able to produce milk for her litter of 8 for 3-4 weeks
POOR MILKERS
It can lower the quality of the whole herd.
ABNORMALITIES
common example of abnormalities:
HERNIAS, ATRESIA, CRYPTORCHIDISM
LETHAL ABNORMALITIES:
- Atresia ani
- Bent legs
- Brain hernia
- Catlin mark
- Cleft palate
- Excessive fatness
- Fetal mortality
- Hydrocephalus
- Legless
- Muscle contracture
- Split ears
- Thickened forelimbs
NON-LETHAL ABNORMALITIES
- CRYPTORCHIDISM
- HAIR WHORLS
- HAIRLESSNESS
- HEMOPHILLA
- INVERTED NIPPLES
6.KINKY TAIL - POLYDACTYL
- RED EYES
- SROTAL HERNIA
- UMBILICAL HERNIA
- SYNDACTYL
- WTATLES
- WOOLY