Red and processed meat consumption within two different dietary patterns: Effect on the colon microbial community and volatile metabolites in pigs

•The microbial community composition differed between treatments.•Campylobacter is characteristic for chicken consumption.•Clostridium cluster XIVa is characteristic for red and processed meat consumption.•Ethyl valerate, 1-methylthio-propane, and 3-methylbutanal differed among treatments.