Hi there,
Anytime you see blood in your pet’s feces, this is something that should be investigated. I encourage you to schedule a visit to your veterinarian. There are many things that can cause this to occur, ranging from a mild and temporary stress-induced colitis to serious disorders such as cancers/tumours, bleeding/coagulation disorders, or a condition called hemorrhagic gastroenteritis.
Because of the possibility of serious disease, it is important that this abnormality is investigated. You may want to bring along a fresh fecal sample (or several from different times, combined) – this will allow your vet to run tests for parasites or more advanced testing for other infections such as bacteria and viruses, if they deem appropriate.
Best wishes and I hope this is helpful for you.
Dr. Kim Hester