Sorry for the loss of your pet, today someone else posted the loss of their pet too.
A different user posted this on her site. Which I thought was wonderful. I'll try to copy it, may be you like it too.
If it should be that I grow frail and weak, and pain should keep me from my sleep,
Then will you do what must be done, for this -- the last battle -- can't be won.
You will be sad I understand, but don't let grief then stay your hand,
For on this day, more than the rest, your love and friendship must stand the test.
We have had so many happy years, you wouldn't want me to suffer so.
When the time comes, please, let me go.
Take me to where to my needs they'll tend, only, stay with me till the end
And hold me firm and speak to me, until my eyes no longer see.
I know in time you will agree, it is a kindness you do to me.
Although my tail its last has waved, from pain and suffering I have been saved.
Don't grieve that it must be you, who has to decide this thing to do;
We've been so close -- we two -- these years, don't let your heart hold any tears