FullBucket Dog Probiotic Supplements - 20 Dose Veterinary Level Formula Made & Owned by Veterinarians For Every FullBucket You Buy, We Give One To An Animal In Need! Used during & after antibiotic treatment to replace GOOD intestinal microbes destroyed by antibiotics. Aid in digestion & suppress disease-causing bacteria which improves immunity. Probiotics have been shown to improve the positive microbes in the GI tract.