I have a cavalier king charles spaniel that has had some unfortunate health issues for the past few years. The most pressing one that I haven't been able to nail down and fix is her GI issues. Every now and then, she has an all night bout of diarrhea even though the only food she has eaten is her hydrolyzed protein dog food. I remember reading about FMT years ago for people who had GI issues and I'm wondering what the results have been for dogs (and other animals). It seems counter intuitive to fight shit with more shit, but at this point I am willing to try most non-invasive treatments. While taking her to the dog park and asking other dog owners if my dog can eat their dog's poo would be the cheapest option, instead I found a site that purportedly has capsules available.

https://doggybiome.com/dog-products-for-diarrhea/

However, because it is difficult to find more information about this company and because I don't want imagine how this type of business (if it worked) could scale up as an industrial factory farm, I am skeptical.

Any thoughts on treating IBD in dogs for an allergy prone, and sensitive dog? She is already getting fiber and she sometimes gets probiotic with her food.