Turn fabric inside out and flush with cold water to remove as much blood as possible. In a bowl, combine 1 tablespoon of ammonia to 1 cup of water. Pour the solution directly onto the stain and allow to set for 5-10 minutes. Rinse well with cold water and launder as usual.
In a small bowl, mix cold water with a few teaspoons of salt. Pour the solution directly onto the stain and allow setting for 5 minutes. Launder in cold water. Repeat if necessary.
DISCLAIMER: Tuxedo Carpet Care is not affiliated with the above mentioned product and cannot be held responsible if the above mentioned product or procedure causes damage to your carpet.