Hi EHubbman –
I would look into other probiotic supplements. Fortiflora isn’t very good – it’s made by Purina and the first ingredient is “animal digest.” Fortiflora also only has 1 probiotic strain. 🙁 Research has shown that 10+ strains are required for optimal GI health in dogs and the more strains present in your dogs gut, the better able he will be to respond to a variety of stressors. The probiotic formulas I recommend are Swanson’s Soil-Based Organisms (14 strains), Dr. Stephen Langer’s Ultimate 15 Strain Probiotic with FOS, Lee Swanson Signature Ultimate Probiotic Formula (13 strains + FOS), Garden of Life Primal Defense (12 strains) and Mercola (14 strains). Due to the fact that he’s on antibiotics it will be critical for him to receive a variety of strains of supplemental probiotics – antibiotics kill all the bacteria (the good and the bad!). Due to the issues he’s having and the fact that he’s on antibiotics I would also give double the recommended dose of probiotics. The Zignature would be worth a shot
