Pet is too small a word.
It is one dimensional.
It is flat and cannot contain all that it is supposed to describe.
Companion is a better one…
One who walks beside
Or maybe Champion…
One who defends, and protects
Affectionate one…
Whose whole body explodes with joy
At the sight of one of us
No matter what the day held
Or who has what mood
Faithful one…
Dependable, steadfast, and sure
Just to be near
Just to sit next to
Is the desire of the heart
Love expressed
In fur, tail, and tongue
Contented one…
A sigh which blows stress away
Breathing in acceptance without words
Understanding curls up next to me
No words needed.
Michelle's Mosaic 
Michelle- there are no words for losing a pet. When you love a pet, they are an intricate part of your person. I can tell you that my dog is so dear to me; she loves me when I need sleep, when I am in a bad mood, when I need a shower. All she asks is that she be near us. How can one not love that lovely being? Jo-Ann
Beautiful!