Monitoring the status of a condition of an animal through visually observable indicia

摘要

There are disclosed methods and apparatus for monitoring the status of a condition of an animal. A condition is selected for monitoring. A monitoring material is selected for introduction into the animal. A method of introducing the monitoring material into the animal is selected. At least one site on the animal is selected for introducing the monitoring material. The monitoring material is introduced into the animal at the selected sites. As a result of the introduction of the monitoring material, a visually ascertainable indication of a status of a condition of the animal appears on the animal's skin. The indication may be observed to thereby visually ascertain the status of the condition.