[Code of Federal Regulations]
[Title 9, Volume 1]
[Revised as of January 1, 2004]
From the U.S. Government Printing Office via GPO Access
[CITE: 9CFR3.7]

[Page 50]
 
                  TITLE 9--ANIMALS AND ANIMAL PRODUCTS
 
  CHAPTER I--ANIMAL AND PLANT HEALTH INSPECTION SERVICE, DEPARTMENT OF 
                               AGRICULTURE
 
PART 3_STANDARDS--Table of Contents
 
 Subpart A_Specifications for the Humane Handling, Care, Treatment, and 
                   Transportation of Dogs and Cats \1\
 
Sec.  3.7  Compatible grouping.

    Dogs and cats that are housed in the same primary enclosure must be 
compatible, with the following restrictions:
    (a) Females in heat (estrus) may not be housed in the same primary 
enclosure with males, except for breeding purposes;
    (b) Any dog or cat exhibiting a vicious or overly aggressive 
disposition must be housed separately;
    (c) Puppies or kittens 4 months of age or less may not be housed in 
the same primary enclosure with adult dogs or cats other than their dams 
or foster dams, except when permanently maintained in breeding colonies;
    (d) Dogs or cats may not be housed in the same primary enclosure 
with any other species of animals, unless they are compatible; and
    (e) Dogs and cats that have or are suspected of having a contagious 
disease must be isolated from healthy animals in the colony, as directed 
by the attending veterinarian. When an entire group or room of dogs and 
cats is known to have or believed to be exposed to an infectious agent, 
the group may be kept intact during the process of diagnosis, treatment, 
and control.