I Have A Min Pin Who Has Had Bloody Diarrhea For About 3 Days Now. She Has Also Been Eating A Lot Of Grass And Then Pooping It Out. I Know That Is A Sign Of An Upset Stomach. I Have Been Feeding Her Kibbles And Bits. Any Advice?

Diarrhea and gastrointestinal problems can be mild and self-limiting often related to dietary indiscretion.  Other more serious problems can cause diarrhea, as the gastrointestinal tract is the stress organ in dogs.  When the diarrhea lasts longer than 2 days or blood appears in the stool it is time to have your dog examined by a veterinarian and have a fecal examination done.  
At home you can start feeding a bland diet--boiled chicken, boiled rice, canned pumpkin, and plain yogurt.