Pochemy.net
pets Animals

Why are rats the most common lab animal to do studies on?

Dr. Aris Thorne
Dr. Aris Thorne
Senior Science Editor · Mar 6, 2026 · Updated Apr 13, 2026

Something I know about! Actually, mice are more common, but rodents in general are used for a few reasons. They're cheap, small, easy to handle, easy to house and feed (mmm autoclaved pelet food), can be placed with members of their own species, can't really hurt you, and reproduce quickly.

121
Words

1 min
Read Time

#65
of 500 in Animals

+78%
vs Category Avg

The Short Answer

Something I know about! Actually, mice are more common, but rodents in general are used for a few reasons. They're cheap, small, easy to handle, easy to house and feed (mmm autoclaved pelet food), can be placed with members of their own species, can't really hurt you, and reproduce quickly. Now, non human primates (NHPs) are a closer biological analog to humans but basically have drawbacks where rodents have benefits (expensive, large, hard to house and feed, low reproductive capacity, can be violent). They're usually saved for later studies after there has been good data generated in mice / rats, if NHPs are used at all. That or studies where a human disease cannot be modeled in another animal besides a primate.

Analysis

Key Concepts: Mice, rodents, used

This explanation focuses on mice, rodents, used and spans 121 words across 6 sentences. At 78% above the average Animals explanation (68 words), this is one of the more thorough answers in this category, reflecting the complexity of the underlying question.

What This Answer Covers

The explanation opens with: “Something I know about!” It then elaborates by presenting a contrasting perspective, ultimately building toward a complete picture across 6 connected points.

How This Compares in Animals

Ranked #65 of 500 Animals questions by answer depth (top 14%). This places it in the comprehensive tier — the top quarter of most thoroughly answered questions. Questions at this depth typically involve multi-faceted topics requiring nuanced explanation.

Frequently Asked Questions

Is there a simple explanation for why rats the most common lab animal to do studies on?

Something I know about! Actually, mice are more common, but rodents in general are used for a few reasons. They're cheap, small, easy to handle, easy to house and feed (mmm autoclaved pelet food), can be placed with members of their own species,…

How detailed is this explanation compared to similar Animals questions?

This is one of the most thorough answer at 121 words, ranked #65 of 500 Animals questions by depth. The key concepts covered are mice, rodents, used.

What approach does this answer take to explain rats the most common lab animal to do studies on?

The explanation uses root cause analysis and contrasting perspectives across 121 words. It is categorized under Animals and addresses the question through 2 analytical lenses.