Friend, I am a bit concern about what you are describing. You see, the black color stool is most likely secondary to bleeding
in the upper gastrointestinal tract, the reason why the blood is black and not red is because it has been digested. His symptoms are consistent with an obstruction. At this point, I would highly recommend you seek veterinary care to have xrays done (with contrast material like barium) to rule out an obstruction, if this is not treated the bowel can rupture with fatal consequences. If you are not able to get him to a vet today this is what you can do until he is seen by a veterinarian:
1- Do not give things like Pepto Bismol, imodium or laxatives. Start him on Pepcid AC (famotidine
) 10mg 1/2 tablet every 12 hours. You can buy Pepcid AC over the counter in any pharmacy.
2- No food or water for 4-6 hours. Need to let his gastrointestinal tract relax, intestines are hyperactive.
3- After 4-5 hours offer a small amount of water. Wait half hour, if no vomiting, offer small amount of rice (50%) and boiled boneless chicken
or ground beef (50%) 4-6 times a day.
4- Follow up with your family veterinarian for xrays.
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