Heidi has had really bad diarrhea since yesterday. She threw up once and it was yellow foam (stomach acid?). She was able to eat a little rice and dog food last night. She's urinating normally but she's not drinking as much as she normally does. After she pees, she sniffs it for a long time like something's wrong with it. She got into some ranch dip on sunday but only got about three licks before I got it from her. Is this what could be making her feel so bad? I feed her yogurt about once a week with her meal and she's never had any problems so I don't think she's lactose intolerant. I'm scared to death that she has a blockage. That's been my biggest fear since she was a puppy. I was wondering if anybody knows if this is how it starts. Should I take her to the vet immediatly or should I give her some pepto first and see if she feels better? I was reading the thread about Chopper and it sounds like this is how he started. She's still playing rough with Chico and acting totally normal until she has a diahrea attack. I might be overreacting but I'd feel horrible if something happened to her.