You are so right. . . I give Galen probiotics. I use pet Flora from Vitality Science. It is a great holistic company. You can call and talk to Stephen. He is wonderful. I have used a few if their products.
Pet Flora for Dogs
Also I give Galen Kefir. It is also amazing. It provides anti-biotic and anti-fungal properties. Also rich in in B complex vitamins, Vitamin A, Vitamin D, Vitamin K and biotin. The main minerals present in kefir tend to be calcium, phosphorus and magnesium. For a small size dogs or cats 1 tsp. – 1 tbsp.
So Long Yeast, Hello Kefir! - Dogs Naturally Magazine