A Partner For Life

Hello everyone will you please harshly critique my poem. I am terrible when it comes to grammar and punctuation and tell me if it's woth submitting into a small contest. Thank you so much.

I found you the day of Halloween,
I brought you home to start the dream.
We had much fun and a lot of luck,
you started to rear but dared not to buck.
I took you to the trainer, to break your habit,
I was upset with you and I had had it.
But you came back to you and we started to win,
we competed all around, you were hardly in your pin.
You were everyone’s favorite and took all the pride,
we were going to state, I was sure of your stride.
But you went back to the trainers to learn one more thing,
things were going great ‘till I got that phone ring…
You laid in my arms and died peacefully,
I cried and cried, things were not heavenly.
Things are still wrong and will never be the same,
I still cry over you, we never knew the blame.
I want to hug you one last time,
Or even see another pick of you in our prime.
I wish you were here for you never knew,
You were the best partner ever, Spencer,
I love you.

Hi!

This was a really good poem, and I think it is worth submitting to a contest - with a few tweaks.

The flow went pretty well until the end, when I think the lines could be a bit longer to balance with the previous lines. The rhyming was also good; it didn't appear forced or distract from the poem, it just fit in. That is, except for one:

You laid in my arms and died peacefully,
I cried and cried, things were not heavenly.

"Heavenly" does not work here. I would change that line, not just the ending, to better suit the line above it.

But you came back to you and we started to win,

This does not make sense at all; perhaps you meant to say "But you came back to me" or "But I came back to you" and got mixed up.

Otherwise, great poem overall and hope you do well in any contest you might enter it in!

-Lili

The part where I say "But you came back you you, we started to win" I am refering to he came back to himself.
thank you for reading.