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Simple Summary: This study investigated the effect of different levels of coffee cherry pulp extract (CCPE) added to broilers' diet on growth performance, meat quality, carcass characteristics, and health parameters. The results indicate that dietary CCPE supplementation positively affects broilers' growth performance and health. Moreover, CCPE is a feed additive that can replace antibiotics in broiler feed. Coffee cherry pulp (CCP) is a by-product of coffee bean production. CCP contains amounts of phenolic compounds that are beneficial for animals. This study evaluated the impact of coffee cherry pulp extract (CCPE) supplementation on growth performance, meat quality, carcass characteristics, serum biochemistry, cecum microbial population, intestinal morphology, and immune and antioxidant responses of broilers. Five hundred 1-day-old Ross 308 chicks were randomly assigned to five groups: a basal diet control, a basal diet with antibiotic growth promoters at 0.25 g/kg, and groups supplemented with CCPE at 0.5, 1.0, and 2.0 g/kg diet over 35 days. The results showed that throughout the experimental period, the groups supplemented with CCPE improved their final weight, average daily gain, and feed conversion ratio (p < 0.05). CCPE at 1.0 and 2.0 g/kg diet reduced the average daily feed intake (p < 0.05). In addition, CCPE at 0.5 g/kg reduced levels of serum alanine transaminase and aspartate aminotransferase (p < 0.05). Triglyceride levels were the lowest in CCPE 2.0 (p < 0.05). In the group supplemented with CCPE at all levels, the high-density lipoprotein levels significantly increased (p < 0.05). Drip loss in the breast at 24 and 48 h decreased (p < 0.05). Additionally, live weight, defeathered weight, and carcass weight significantly increased (p < 0.05). Furthermore, CCPE improved intestinal morphology, especially villus height and the villus height per crypt depth ratio (p < 0.05). CCPE supplementation also reduced pathogenic bacteria, increased Lactobacillus spp. (p < 0.05), and increased the expression of immune-related genes and antioxidant activity in the liver and intestines (p < 0.05). Therefore, the use of CCPE as an alternative to antibiotics in broiler feed improved growth performance and health parameters in broilers. It provides a sustainable and environmentally friendly option for supplementary feed, contributing to more efficient poultry nutrition management. [ABSTRACT FROM AUTHOR]

Simple Summary: This study explored the effects of incorporating spent mushroom substrate (SMS) from Flammulina velutipes as an exogenous enzyme in broiler diets. The objectives of this study were to evaluate the impact of being fed varying levels of SMS on the growth performance, carcass characteristics, meat quality, blood chemistry, cecal microbiota, and small intestinal morphology of broilers. The findings indicate that dietary supplementation with SMS significantly enhances growth performance, improves carcass characteristics, reduces serum cholesterol, and positively influences gut health. Supplementation with spent mushroom substrate (SMS) as an exogenous enzyme in broiler diets represents a promising nutritional strategy to enhance production efficiency and reduce costs. To assess the effects of SMS enzyme products on various parameters, including growth performance, blood chemistry, carcass and meat quality, and gut health, a study was conducted with one-day-old broilers (n = 500). The broilers were separated into five groups: a control diet (CON) and an antibiotic group (AGP) which were added to the diet at 0.25 g kg−1, and SMS from Flammulina velutipes supplementation groups which were added to the diet at 0.5 g kg−1 (SMS0.5), 1.0 g kg−1 (SMS1.0), and 2.0 g kg−1 (SMS2.0). Final body weight and average daily gain in broilers which were fed the AGP diet were higher than in broilers which were fed the CON, SMS0.5, and SMS1.0 diets. Broilers in the CON group had a decreased average daily feed intake compared to other groups. The addition of AGP and SMS2.0 diets improved the feed conversion ratio and reduced the feed cost per gain in broilers. Broilers that were fed the CON diet had the highest serum cholesterol, while the AGP diet increased triglyceride. Dietary supplementation of SMS improved some carcass characteristics and ceacum microbial content in broilers, especially with the SMS2.0 diet. Broiler fed CON and SMS0.5 worsened the villus height/crypt depth ratio of duodenum histology. In conclusion, SMS supplementation at 1.0 and 2.0 g kg−1 can improve productive performance and health in broiler diets; however, SMS2.0 had the best efficiency. [ABSTRACT FROM AUTHOR]