Kaw dogs/horses.

[Rankin, Robert L]

In Kaw 'horse' has taken over $oNge entirely, although there is a
Spanish synonym, kkawaye.  'Dog' is $oNgiidaN, contracted from
$oNge+oyudaN 'dog+pull-on', i.e., the animal used to pull the travois.
This seems to be the common thing in languages -- the new object
requiring a name takes over an older name completely and the object the
name used to refer to gets a modifier or a replacement term.

Bob