Effect of dietary metallo-protease and Bacillus velezensis CE 100 supplementations on growth performance, footpad dermatitis and manure odor in broiler chickens

• Published in: Animal bioscience Vol. 35; no. 10; pp. 1628 - 1634
• Main Authors: Park, Cheol Ju, Sun, Sang Soo
• Format: Journal Article
• Language: English
• Published: Korea (South) Asian - Australasian Association of Animal Production Societies 01.10.2022; Animal Bioscience; Asian-Australasian Association of Animal Production Societies; 아세아·태평양축산학회
• Subjects: animal welfare; broiler; Broilers (Poultry); enzyme; Food and nutrition; footpad dermatitis; Growth; Health aspects; manure odor; Probiotics; Proteases; 축산학; South Korea; Probiotics; Broiler, Enzyme; Animal Welfare; Manure Odor; Footpad Dermatitis
• ISSN: 2765-0189; 2765-0235; 2765-0235
• DOI: 10.5713/ab.22.0033

Objective: This study focused on the effect of dietary metallo-protease and Bacillus velezensis CE 100 on growth performance, carcass parameters, intestinal microflora, footpad dermatitis (FPD), and manure odor in broiler chickens.Methods: One hundred-ten (two-day-old Ross 308) broiler chicks were randomly assigned to five groups with two replicate pens. The dietary treatments were divided to control, metallo-protease groups (A1, added with 0.1%; A2, added with 0.2%) and B. velezensis CE 100 groups (B1, added with 0.5%; B2, added with 1.0%).Results: The feed intake was decreased in A1 and B2 compared to the other group (p<0.05). The liver weight was lower in B2 than in A2 (p<0.05). The Salmonella in the cecum was decreased in A2 compared to control and A1 (p<0.05). However, the lactic acid bacteria were increased in all treatments (p<0.05). The litter moisture content was decreased in A2, B1, and B2 (p<0.05). The litter quality visual score was increased in all treatments (p<0.05). The FPD score and prevalence were reduced in all treatments (p<0.05). The (CH3)2S emission was decreased in all treatments (p<0.05).Conclusion: The present study indicated that both additives improve litter quality and reduce the incidence of FPD. These findings suggest that dietary metallo-protease and B. velezensis CE 100 have the potential to improve the broiler chickens’ welfare.