I had the opposite problem. I tried just a quarter teaspoon in TT's food 3 times a day but it didn't help. Once the worms were cleaned out he got better.
I got sulcrate from the vet. !/2 cc 3 times a day. It lines the bowels and makes things move easier with less stress to him. I don't know if it would work for Charlie or not, poor little girl. :sad:
Have you phoned to see what your vet says? Sulcrate, if it would work, isn't expensive. I think I paid $14 for a med jar full. It lasts a long time.
Sorry I can't be more help.