Housing should be designed to provide an environment that allows animals to maintain their health and achieve optimal growth. Housing conditions, such as population size and density, present potential ...

But what does that mean? The simple answer is how heavy something is for its size. If something seems very heavy for its size (like a heavy metal object), we say it is more dense. If something seems ...

At many breeding facilities, rats are housed at relatively high densities until they are 5 weeks old, at which point they are either shipped for research or rehoused at standard cage densities ...