|Condition: Often while examining carcasses,
biologists find signs that an animal was in poor health condition. An arthritic leg
joint found at a carcass site suggests the elk was unable to fully extend its leg, and
therefore, it was slower than other elk, a prime target for wolves.
Evidence of malnutrition, injury, disease, or parasite infestation that contributed to a weakened condition in the prey might also be found.
By removing herd members with disease and parasites, wolves can help prevent an epidemic die-off in which many members of the herd become infected and die.