Very well done, Jackie. Such a sad story. I've lived through similar ones myself.

You took us easily through the sadness, anger and acceptance of losing a pet.

I liked the repeating of the first stanza as the last. It really made the whole thing hit close to home.

Just a couple suggestions:

~Relive and replay (no spaces)
~first line of third stanza, I think should end in "me" not "you" to fit with the resst of the poem.
~in the first/last stanza, third line, i think "is" should be "was" to match the "was" of the previous line.

Keep up the good work. I'm looking forward to reading more from you.