I'm so sorry to hear about this loss.
I may not have read correctly, or skipped where you put it in, but, how old was he?
I had a dog named Bird, he was a Chocolate lab. We had to put him down. We took one last picture of him that day, in the morning, before my brother and I went off to school. He was about 16. He could barely walk. So, yeah. It was a great dog. But, this isn't about me and my dog.
I'll pray for him. As many said earlier, he won't truely be gone, always in your heart.
And on your phone. ;D All jokes aside, I'd really like to learn about your dog.
R.I.P <--- (I know it's not just yet.)