105 CMR 910.133
Classification and Separation
Dogs or cats housed in the same primary enclosure shall be maintained in compatible groups, with
the following additional restrictions:
(A) Females in season (estrus) shall not be housed in the same primaryenclosure withmales, except
for breeding purposes.
(B) Any dog or cat exhibiting a vicious disposition shall be housed individually in a primary enclosure
or in a manner which will not be a threat to other animals. Muzzles shall not be used as a primary
method for restraining such animals.
(C) Puppies or kittens shall not be housed in the same primary enclosure with adult dogs or cats other
than their dams, except when permanently maintained in breeding colonies.
(D) Dogs shall not be housed in the same primary enclosure with cats, nor shall dogs or cats be
housed in the same primary enclosure with any other species of animals.
(E) Dogs or cats under quarantine or treatment for a communicable disease shall be separated from
other dogs or cats and other susceptible species of animals in such a manner as to minimize
dissemination of such disease.