An aid during periods of intestinal dysfunction, including treatment and control of scouring and diarrhoea, exclusion and suppression of pathogens such as E. coli, Salmonella and Aeromonas ssp. Post antibiotic therapy for the re-establishment of gut microflora following antibiotic use. Probotic may be used during periods of extreme stress eg: overcrowding, diarrhoea, temperature extremes, transportation, training and medication; and following surgery. Probotic is compatible with feed ingredients including anthelmintics, coccidiostats, minerals and vitamins.