Here you can write a poem about your pet who has passed. I just finished writing this short one. If you look at the first letter of each line, it vertically spells my cat's name: McCartney. You can try this too if you want, using your pet's name. It's fun to try it this way, and kind of makes you write a poem differently than you might normally.
Here's my poem:
Many moments I spend thinking of you,
Crying and smiling again and again.
Can't believe your passing is true,
Although our friendship still will never end.
Rewinding time is something I wish,
To hold you and watch you be so clever.
No longer can I give you a real kitty kiss,
Even so, you'll always be my treasure, and
Years from now we'll be together forever.
~I love you eternally, McCartney boy~
You can visit my kitty McCartney's Rainbow Bridge Memorial here: http://www.rainbowbridge.com/residents/MCCAR001/Resident.htm