Jeannie, you and Tibbe are so dear to me. I'm so sorry he is not feeling well. I don't know if it can be purchased through Amazon, but I give Katie a probiotic and digestive enzyme that was recommended by Ann that really helps when Katie has an upset stomach. I'm sure the company can help answer questions about whether it will cause issues with Tibbe's liver. The owner of the company is very knowledgeable. I really trust this company and have purchased many products from them.
DOGZYMES Probiotic Max 8 oz » Natures Farmacy Inc. Systemic Yeast Infections in Dogs | Natures Farmacy Inc. THE FORGOTTEN ORGAN IN OUR BODIES??? DO YOU KNOW WHAT IT IS? | Natures Farmacy Inc.
I've never dealt with yeast infections, but the medications that Ann suggested might be a good idea first and then a follow-up with a good probiotic. I realize that there may be too many ingredients in Nature's Farmacy for an allergic dog, but I would call and speak to Jennifer, and she might be really helpful. I trust that she would not recommend anything that would harm Tibbe.
Hugs to you and Tibbe. I have been especially busy with work and John and Katie, but just know you are never far from my thoughts or heart. I will pray for both of you.