Are common laboratory rats considered desert animals relative to kidney function?

Some rat and mouse species are adapted for desert life.  While R.
norvegicus (common lab rat), does produce highly concentrated urine,
it may be held in contrast to the Kangaroo rat, which is a desert
adapted organism.  It is worth pointing out that this is in contrast
with the georgraphic and habitat preference in nautre. So, yes, they
have great kidney function in terms of highly concentrated urine, but
this is contradictory to their habitat.