SELECTION AND CARE OF ANIMAL BEFORE SLAUGHTER
Several factors should be considered before slaughtering a lamb for home consumption. The most important considerations are health, care of the animal prior to slaughter, kind of animal (lamb or mutton), and expected meat yield.
Health
One should take care that an unhealthy animal is not selected for slaughter. At the time of selection, look for signs of sickness such as fever, increased breathing rate and diarrhea. Animals suspected of being unhealthy should be treated by a veterinarian until the animal is returned to a healthy state.
Animal Care
To obtain high-quality meat, it is important to exercise proper care of the animal prior to slaughter. Pen the animal in a clean, dry place the day before slaughtering. Restrict the animal from feed 24 hours prior to slaughter, but provide access to water at all times. Withholding feed results in greater ease of evisceration (because the gastrointestinal tract is smaller) and minimizes the migration of ingested bacteria from the gastrointestinal tract into the blood stream. Access to water enhances complete bleeding, results in brighter colored lean in the carcass, and enhances pelt removal.
Animal Type and Meat Yield
Animal age will have a sufficient effect on the palatability of the cooked product. Carcasses from sheep are classed as lamb (12 to 14 months or less), yearling mutton (14 to 24 months), or mutton (over 2 years) on the basis of differences that occur in the development of their muscular and skeletal systems. Differences in palatability between the lamb and mutton meat are substantial. Meat from mutton carcasses has a very intense flavor which is undesirable to some individuals. Mutton is seldom marketed as retail cuts but rather as soup stock or in further processed meat items.
A meat-type lamb carcass, when cut and trimmed according to the methods described later, will yield over 70 percent of its carcass weight in major trimmed cuts. Expected yields of retail cuts from a yield grade 2 (trim) and a yield grade 4 (wasty) carcass are presented in table 1.
| Closely trimmed retail cuts | Percentage of carcass weight | |
| Yield grade 2 | Yield grade 4 | |
| Leg, short cut | 22.2 | 19.4 |
| Sirloin | 6.4 | 5.8 |
| Short loin | 10.1 | 9.5 |
| Rack | 7.9 | 7.5 |
| Shoulder | 23.8 | 21.6 |
| Neck | 2.1 | 1.9 |
| Breast | 9.8 | 9.8 |
| Foreshank | 3.4 | 3.2 |
| Flank (boneless stew) | 2.3 | 2.3 |
| Kidney | 0.5 | 0.5 |
| Fat | 8.2 | 15.4 |
| Bone | 3.3 | 3.1 |
| Total | 100.0 | 100.0 |
| Adapted from Smith, King & Carpenter, 1975. | ||