I'm not even sure what I am looking for here, I feel like I might just need to vent my frustrations. First-time cat owner. I adopted a roughly 8 year old kitty from the shelter a short time ago, he was at the shelter for almost 3 months. He had soft stool when I adopted him and he was on Metronidazole (I think) when I took him home and got another prescription for it last week, and if anything he has gotten worse and is having consistent diarrhea now. I had a Fecal test done and it came back negative for parasites/worms. His dose for metronidazole has been double this time because he is a large cat, (hopefully this is why it wasn't working?) his diet has been changed to Hills prescription diet i/d, and I picked up some Fortiflora? from the shelter today to put on his food once a day. Luckily the shelter is covering these prescriptions because it was a preexisting illness. I really hope that I can help this poor old guy and have him feel better. And a bonus would be not having to worry about him tracking poop through my house from the mess he makes in the litter box. Anyone experience this, or have any advice on a time frame when I may see a change with the prescription diet or fortiflora if it works?