Wire-bottom cages equipped with a resting surface (e.g. solid-surface platform [6.5 in x 3.5 in], "Rat Loft"1 or tube2 may be used for up to one year to house rats providing they do not exceed one year of age. Proposed use of these cages for more than one year or without a resting surface requires scientific justification. "Scientific justification" means that use of these cages would be essential to the conduct of specific research or experimentation.
1 "Rat" loft as designed by N. J. Benevenga and used in preliminary studies in the laboratory of Dr. M. Clagett-Dame by Mary Kaiser. Loft is made of stainless steel and is 6.5 in x 3.5 in. and hangs 3.5 in. above the cage floor.
2 Opaque plastic tubing 6 in (L) x 2.5 in. (D)
Adopted on November 19, 2003