A. Blood near the rear can be caused by a number of things. Bright red blood in the stool or around the anus can indicate a problem with the colon or anal region such as constipation, tears, illness or problems with the anal glands.
Blood that is dark or black in the stool can indicate a problem with the upper intestines such as the stomach or small intestine. This is usually considered more serious than bright red stool, however any blood seen is cause for concern. If the blood is seen more than once or twice, making a vet appointment is a must.
If your dog is not eating and is having blood in either her stool or vomit, making an appointment with your local vet is best. Illness, digestive upset or problems with internal organs can all cause these symptoms. In the mean time, a bland diet of plain boiled chicken and plain white rice may help to soothe minor digestive upset until you can get into the vet.
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