Devices and methods for tracking animals include assigning an animal identification to a first animal. Collecting a biological sample from the first animal and associating the first animal with each premises at which the first animal is located. The invention further provides an identification device that includes a tag portion and a sample portion. The tag portion can be configured to be attached to an animal in any method known in the art. The sample portion can be detachably coupled to the tag portion and can include a biological collector that can collect a biological sample from the animal.