We also insert a PIT (Passive Integrated Transponder) tag, or microchip in each pup for identification later in life. The PIT tag is inserted just under the skin between the shoulder blades. This is the same type of transponder chip commonly used in the family dog and cat for identification. When the wolf pup has grown and we capture it to fit it with a radio-collar, a simple scan of the PIT tag will let us know exactly who the animal is. This prevents us from having to temporarily hold the animal in captivity while we await the results of a blood test to determine its identity.
When all the pups have been processed and their information recorded, we carefully return them to the den where their mother will return to care for them soon after our departure. After this process is completed, additional notes may be recorded pertaining to den characteristics, surrounding habitat, or any other interesting or distinquishing features present.