This study aims to determine the impact of the difference in cutting time on the weight of offals (internal offals and external offals). The study used a completely randomized design (CRD) with three treatments and six replica- tions. The treatments were: Slaughter on the first day (W1), slaughter on the second day (W2) and slaughter on the third day (W3). The results of the study were that broiler chickens reared in a closed house system and slaughtered on the second and third days experienced a decrease in internal offals weight in the liver by 8.50 – 18.91% and on internal fat 36.74 – 60.77% (P<0.05). The difference in slaughter time did not cause a decrease in internal offal weight in the heart, intestines and gallbladder weight (P>0.05). External offals on the neck there was a weight loss of 4.01 – 8.04% as a result of the difference in slaughter time of 2 – 3 days (P<0.05). The difference in slaughter time had no impact on head weight and foot weight (P>0.05). The conclusion of this study is that the difference in slaughter time of 1-3 days causes a decrease in liver weight and internal fat (internal offals) and a decrease in neck weight (eksternal offals).

This research was conducted with the aim of knowing the effect of using protein concentrate based on broiler farm waste (KPLA) in rations on weight loss and digestive organ weight. The research used a completely randomi- zed design (CRD) with three treatments and four replications. The treatment is, A: with the use of 0% KPLA, B: with the use of 12% KPLA and C: with the use of 24% KPLA. The research used 12 pigs finisher phase with an average body weight of 66.6 ± 7.74 kg. The research parameters were body weight loss, small intestine weight and length, large intestine weight, and spleen weight. The results of the research were, after fasting for 12 hours, with the use of 0% and 12% KPLA there was a loss of body weight of 2.4% and 1.8% (P>0.05). The use of 24% KPLA (C) can increase body weight loss by 6.2%, significantly higher compared to A. The use of 0% - 12% KPLA does not cause a significant difference in the weight and length of the small intestine (P> 0.05), but with 24% KPLA (C) significan- tly reduced the weight of the small intestine by 11.9% and 11.3% in the length of the small intestine (P<0.05). The use of 0% - 24% KPLA did not affect the weight of the large intestine and the weight of the spleen (P>0.05). The conclusion of this research was the use of KPLA up to 12% did not cause significant changes in the parameters of slaughter weight, weight loss, weight and length of the small intestine. It is recommended to use KPLA in landrace pig rations up to 12%.