I cannot stress how important it is to get your dog to the vet immediately after seeing the stool. Take a sample with you, so it can be tested for bacterial infections.
There could be many reasons for your father's bloody stool. I would suggest him going to the doctor. It could be possible that something more serious is happening that might need to be addressed.
That is not a symptom.
If the stool is watery that means there is diarrhea.
Diarrhea
Bloody stool can be a indicator of anal fissure, peptic ulcers or a number of other medical conditions.
Meat can cause constipation but I wouldn't say bloody stool. You should immediateley talk to a doctor.
If he is passing frank blood he probably has a polyp. If it is mixed with fecal matter he could be having dysentery.
Bloody stool could be cause by many things including hemorrhoids or intestinal polyps. However, it maybe a more serious medical condition and should be referred to a medical professional. Bloody stool had be associated with some serious medical conditions in some occasion, so please check with your primary care physician.
There are many reasons behind bloody stool. Particularly because one may have a swollen vein in the anus. This can also be a sign on Colorectal cancer (colon cancer).
Well you get a lot of the runs and you have bloody stool
Okay... I had this problem before... I had cancer
Causes of this could range from the relatively harmless (a hemorrhoids) to cancer. The best thing to do is to ask your doctor. Find out more here: http://www.medicinenet.com/rectal_bleeding/symptoms.htm