Friend, I am sorry Crissey has diarrhea. The red color in the diarrhea is likely blood. When we see blood in the stool it is a sign of inflammation in the colon (large intestines). This can be caused by many different medical conditions. It will be difficult for me to determine the exact underlying cause without a hands-on examination and some testing, I am sorry. But, in a puppy like Crissey common causes are dietary indiscretion, ingestion of a foreign body, infections, intestinal parasites, etc. to name a few causes. This is what you can do:
1- Do not give things like Pepto Bismol or Imodium. You see, stopping diarrhea with medication can make things worst if this is related to an infection or ingestion of a foreign body.
2- No food or water for 6-8 hours, need to give her gastrointestinal tract time to rest. Then, offer a small amount of water followed by a diet of rice (75%) and boiled boneless chicken or ground beef (25%) until the stool is back to normal then wean her back into the regular diet. Keep her indoors in a cool room and no exercise when fasting.
3- Supplement with a probiotic, these are friendly bacteria that help with regularity. You can buy this over the counter in any pet store.
4- I would have her examined by your family veterinarian including a fecal analysis as an initial screening test.
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