Preparing for the Death of your pet

When we lose someone we love, we should remember that the person has not become nothing.  ‘Something’ cannot become ‘nothing,’ and ‘nothing’ cannot become, ‘something.’  Science can help us understand this, because matter cannot be destroyed—it can become energy.  And energy can become matter, but it cannot be destroyed.  In the same way, our beloved was not destroyed; she has just taken on another form.  That form may be a cloud, a child or the breeze.
We can see our loved one in everything.

Thich Nhat Hanh, No Death, No Fear