Alternatives to the Use of Animals in Research
Species-Specific Information & Drug Formulary
Standard Procedures & Guidelines
Policies & Regulations
Animal Care & Use Program
How to Apply to the IACUC
Frequently Asked Questions
MHS Questionnaire
Meetings
Contacts
Forms
Notification/Fasting Request Form
Animal Welfare Concerns
For New Users
NEW PSB Classroom Presentation & Facility Orientation
Animal Research & Care
Laboratory Animal Resource Center
OR New Investigator Quick Guide
Policies & Guidelines
Mandatory Health Screening Policy
Training Program
Useful Links
What's New
Good Lab Practice (GLP)
Veterinary Services
Working Safely with Animals
RIO
Research Online (for online training)
Research News
ANIMAL IDENTIFICATION: THE SHEEP
Individual identification of animals plays a critical role in accurate record keeping. There are several methods of identification for each species. The needs of your lab should dictate appropriate method for the animal identification. USDA covered species are required by law to have identification.

Method Advantages Disadvantages
Non Toxic Markers and Dyes
  • Inexpensive
  • Simple procedure
  • Temporary
  • Can be difficult to visualize when wool is heavy
  • Must be reappliedd as needed
Collar
  • Easy to use
  • Anesthesia not required
  • Collar can get caught on caging
  • Can be difficult to visualize when wool is heavy
  • not a permanent means of identification
Ear Tag
  • Inexpensive
  • Anesthesia not required
  • Simple procedure
  • Permanent
  • Possibility of local infection
  • Animal must be securely restrained
  • Tags can become dislodged
  • Tags may get caught in caging
Electronic Transponders
  • Efficient
  • Highly accurate
  • Easy to use
  • Anesthesia not required
  • Permanent
  • Expensive
  • Current technology lacks standardization among products
  • Animal must be securely restrained