I'm curious about this, but skeptical about the claim that the gut bacteria is that different.
I went to the FortiFlora site and found that the ingredient they mention is Enterococcus faecium.
Okay, what's that? "Enterococcus is a large genus of bacteria to which the species Enterococcus faecium belongs. This bacterial species is gram-positive, spherical, and often occurs in pairs or chains, rather than clumps. Mammals, including humans, usually have Enterococcus colonies already in and on their bodies, particularly in the gastrointestinal tract and on the skin."
https://www.globalhealingcenter.com/nat ... ic-strain/
Wikipedia and multiple other sites tell me that enterococcus faecium is found in the guts of both humans and dogs. I look to see if it's an ingredient in probiotics for humans, and yep, it is. In many of them.
So on a 10-minute inquiry, I would say that FortiFlora is not superior to human-grade probiotics, so long as the human-grade probiotic being used contains enterococcus faecium.
FortiFlora contains a few other things that dog owners might want to administer -- some low doses of vitamins C and E -- but as a probiotic, I can't see how it's superior.
Animal digest, Enterococcus faecium, L-ascorbyl- 2-polyphosphate (source of Vitamin C), Vitamin E supplement, zinc proteinate, beta-Carotene, salt, manganese proteinate, ferrous sulfate, copper proteinate, calcium iodate, sodium selenite.
So I'm curious too.