Why does my dog's diarrhea return when I feed her regular food?

Question

My 5 year old Bernese Mountain Dog has been having Diarrhea for a few weeks now. We have tried medication, prescription food, probiotics, and nothing has worked. It does stop if I give her a bland diet of boiled chicken and rice for a couple days, but as soon as I try to mix in her regular food (Purina One Smart blend healthy weight ) the issue comes right back. We are currently feeding her Hills I/d prescription diet with a probiotic and metronidazole. What would you recommend the next step be? Pet's info: Dog | Bernese Mountain Dog | Female | spayed | 5 years and 8 months old | 90 lbs

Laura Johnson VMD · Accepted Answer

Hi, thanks for using Petco Pet Education Center, formerly Petcoach! If the diarrhea only comes back when you start adding the Purina One Smart Blend in to the i/d then I would change foods. It sounds as though she has developed a sensitivity to that food or the protein in the food. If the Purina is chicken based try to get a formula with out chicken. Otherwise be sure you check a fecal and even consider deworming her (even if sample is negative), run general blood work to be sure nothing systemic is going on. Hill's i/d is a balanced diet and can be fed long term, worse case scenario. Personally I think it might be the Purina One formula, so I would try a different brand or different Purina one protein source. I hope this helps and I wish Maci the best!

Why does my dog's diarrhea return when I feed her regular food?

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