Doc Roy's GI SYNBIOTICS GEL is a powerhouse combination of prebiotics and probiotics. This highly palatable, chicken flavored gel contains live (viable) naturally occurring microorganisms to maintain a healthy microbial balance in the dog's or cat's GI tract. Recommended to minimize the potential for diarrhea and will strengthen the dog's or cat's immune system. Safe to use in dogs and cats of all ages and stages. Contains MOS, a unique ingredient to support the growth of good bacteria and help remove bad bacteria from the GI tract.