Section [Code of Federal Regulations] [Title 9, Volume 1] [Revised as of January 1, 2005] From the U.S. Government Printing Office via GPO Access [CITE: 9CFR3.133] [Page 119] TITLE 9--ANIMALS AND ANIMAL PRODUCTS CHAPTER I--ANIMAL AND PLANT HEALTH INSPECTION SERVICE, DEPARTMENT OF AGRICULTURE PART 3_STANDARDS--Table of Contents Subpart F_Specifications for the Humane Handling, Care, Treatment, and Sec. 3.133 Separation. Animals housed in the same primary enclosure must be compatible. Animals shall not be housed near animals that interfere with their health or cause them discomfort.