Our cat (previous life, previous wife etc) was called Cat. Made sense to me anyway
In a simialr vein Nick could call this one Coon.
Our dog is called Skilos (dog)... 
Proves my point exactly. (I too used to have a dog called Dog)
Mrs S#1 reckoned I had a warped mind for using such names. Mind you I frequently called her "Wife" and eventually "Ex-wife". It wasn't a warped mind ~ just that I found it easier to call things, people etc by their function rather that have to remember names. Thus a tap was a tap, a door was a door, a boss was "Boss", children were "Children" or if I was addressing one only then "Child". Seemed obvious to me.
After all she called me "You" or "Oy You" for years.