Dog blood, like human blood, is red. The color comes from hemoglobin, a protein in red blood cells that carries oxygen throughout the body.
While blood in veins may appear blue under the skin, this is due to the way light reflects through the skin and not the actual color of the blood.
However, you may see blood in your dog's stool or vomit that appears different colors, such as:
- Bright red: This indicates fresh bleeding from the lower digestive tract.
- Dark red or black: This suggests bleeding from the upper digestive tract.
- Tarry black: This is a sign of digested blood.
If you notice blood in your dog's stool or vomit, it's important to contact your veterinarian immediately.
