I have a nine week old westie. He has diarrhea. We have continued the diet from his previous owners. we brought him home on saturday. He is still quite lively and likes to keep me up at night my concern is that there is something seriuosly wrong with him. I would add he is on kibble and the previous owner advised us to soak the kibble to soften before adding some chicken. His poo is quite smelly.Can I do anything to help stop this.