When we brought home our last girl, she had really bad diarrhea off and on for several weeks. The vet gave us some kind of charcoal tablets that helped.
Slowly, she got over it. We feed her Iams mini chunks with added cooked chicken or hamburger, but not too much. We still worry about causing her
to have runny BM's and we have had her for 4 years. It seems to me that greyhounds have really sensitive digestive systems. Most of the time everything
runs through OK, but sometimes someone will give her something that causes a couple days of diarrhea. Hope your baby feels better soon.