Animal Products Processing and Utilization
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Meat and Meat products factors to consider in slaughtering animals
• cleanliness of meat products • hygiene of production • efficiency of meat inspection • adequacy of meat preservation
selection of animals for slaughter
• health • age • sex • size
health selection
animals must be in good condition
recommended age of livestock for slaughter: swine
6-12 mon
recommended age of livestock for slaughter: cattle and carabao
3 yrs or younger
recommended age of livestock for slaughter: goats
1 yr
have juicier meat
old animals
best sources of meat for curing
barrows and gilts
castrated male pigs
barrows
female pigs that have not yet given birth
gilts
age of boars that can still be used
200 days old or below
offensive odor and flavor in pork from uncastrated male pigs, caused by high levels of androstenone and skatole that develop after puberty
Boar taint
when does boar taint become apparent
7 mon
meat is tough and during the advanced stage of pregnancy, the meat have an undesirable (fishy) odor
sows
tend to deposit more fat
castrated males
contain 8% more muscle and 38% less fat than steer carcasses
bull carcasses
size for slaughter: hogs
80-100 kg
size for slaughter: cattle and carabao
300-450 kg
Management of Animals Prior to Slaughter
• fasting • relaxing the animal • handling the animals gently • clean animals
withdrawal of solid feed and only water is provided ad libitum
fasting
fasting duration: hogs
12-24 hrs
fasting duration: ruminants
24-48 hrs
advantages of fasting
• savings in feeds • ease of cleaning entrails and eviscerating the carcass • thoroughly-bled and brightly colored carcass • long shelf-life • low shrinkage
if stress is not so severe, pork tends to be what
pale, soft, exudative (PSE)