Every mouse carries an implanted tag, so nobody picks it up to check who it is, and one group can be followed for months.
less hands-on time
~about 80%
fewer mice
~about 45%
lower cost in staff time and mice
~about 50%
Estimates for one study comparing wild-type and knockout mice on open field, circadian rhythm, dominance and social behaviour, against running the usual separate tests. Cost counts staff time at US$25 an hour and mice at US$100 each, including housing; equipment and tags are not included.
Writing an animal ethics application? We send a Trumouse information pack written for ethics committees.