Animal Cage Space


Recommended Space for Commonly Used Group-Housed Lab Animals

Source: ILAR Guide for the Care and Use of Lab Animals


Conventional Mouse Cage/Weight Restrictions

  Required Conventional Cage (82.5 inches2; Height
(Cage Floor to Cage Top): 6 inches)
Weight Floor Area/Animal, in2 Height, in # of Animals
<10g 6 5 13
Up to 15g 8 5 10
Up to 25g 12 5 6
>25g at least 15 5 5

Transgenic Mouse Cage/Weight Restrictions

  Required Transgenic Cage (80.5 inches2; Height
(Cage Floor to Cage Top): 5 inches)
Weight Floor Area/Animal, in2 Height, in # of Animals
<10g 6 5 13
Up to 15g 8 5 10
Up to 25g 12 5 6
>25g at least 15 5 5

Rabbit Cage/Weight Restrictions

  Required Allentown (5.3ft2; Height: 18 in) Stainless Steel (4 ft2; Height: 15in)
Weight Floor Area/Animal, ft2 Height, in # of Animals # of Animals
<2kg 1.5 14 3 2
Up to 4kg 3 14 1 l
Up to 5.4kg 4 14 1 1
>5.4kg over 5 14 1 --

Rat Cage/Weight Restrictions

  Required Shoeboxes (171 in2; Height: 8in) Stainless Steel (80 in2; Height: 7.5)
Weight Floor Area/Animal, in2 Height, in # of Animals # of Animals
<100g 17 7 10 4
up to 200g 23 7 7 3
Up to 300g 29 7 5 2
Up to 400g 40 7 4 2
Up to 500g 60 7 2 1
>500g at least 70* 7 2 1

* Larger animals might require more space to meet the performance standards.


Updated June 12, 2007 by SAK