By the way, can a 6-year-old dog use Maide's probiotics?

Yes, you can.

My family Cai is 8 years old. She is a lovely long-haired Ke Jiquan. Keji has a glass stomach, often has diarrhea, and his ass will always rub against furniture. It's really miserable! Later, I once dragged myself into the hospital, and the doctor prescribed Maide's probiotics, saying that it is a dual-patented probiotic with IV, which can effectively reduce intestinal toxins and enhance immunity. Now Cai doesn't have diarrhea very much, and I feel that my gastrointestinal function is really good ~