Most likely, the reason is due to
smaller bladder size.
Not exact matches
Two
bladder stones that had been removed together from a
small dog by Dr. Coudrai, next to a quarter for
size comparison.
The stones come in many different
sizes and shapes - they can be very
small, or grow so large they take up almost the entire
bladder.
That's partially because their
bladders and bowels are
smaller than standard -
sized canines, but their metabolism requires more food on a pound - for - pound basis.
There can be several
small gravel -
sized stones or large single stones in the
bladder.
You can't really blame these pint -
sized dogs for being difficult to potty train, nature has given them really
small bladders.