It’s an old post, but those of going through this for the first time take comfort over responses like yours.  I lost my best friend of 12.5 years Saturday, June 2 at 2am.  I knew he had a hemangiosarcoma, but thought we had a few more months.  It happened quickly, while I was away on vacation, and I was able to rush home to say goodbye.  Though I don’t doubt it was the right, kindest, and best way for me to show my love, ending my dog’s life was difficult.  Not the choice, but the aftermath of coming home alone.  Thank you for taking the time to respond, as yours are words I needed to hear today.