Oh NO!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Oh Marina, I am SO SO SO SO sorry! I can't begin to imagine how insanely difficult this was for you.
I'm just now seeing this, and my heart is absolutely BREAKING for you, and I was SHOCKED to see your post here, and started crying as soon as I realized what happened.
Oh sweetie.... I have no words of comfort, because your heart has been ripped right out of you. You already know you made the only decision you could, and that he had a wonderful life.... but it hurts no less.
I've been away from this forum, mostly, for the last few weeks, so I just found this. What a hard way to lose your dear Sammy. I had a "teddy cat" myself once. I know how dear he was. I'm so sorry.