Video: Bigfoot hair samples
Hair and Blood Samples
Hair samples have been taken in North America that cannot be linked to a specific animal. When testing samples of hair and blood there are some problems. The tests done offer little information because there is no conclusive sample to compare it to. All that can be done is to compare it to known samples, which will lack all known animals.
Feces has been found that is said to belong to Bigfoot. This creature is thought to eat 5000 calories a day, although only a few such samples have been found.