9 C.F.R. § 3.133 Separation.
Title 9 - Animals and Animal Products
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.
Title 9: Animals and Animal Products
PART 3—STANDARDS
Subpart F—Specifications for the Humane Handling, Care, Treatment, and Transportation of Warmblooded Animals Other Than Dogs, Cats, Rabbits, Hamsters, Guinea Pigs, Nonhuman Primates, and Marine Mammals
Animal Health and Husbandry Standards
§ 3.133 Separation.