Hello Hana,
I am so sorry to hear about your dog, she sounds such a sweetie. Yes, you are right, she did have a kind end to her life, and when you think of all those poor dogs who never know kindness and love from humans, there is a lot to be said for that. I know you will miss her, and she will always hold a special place in your heart. I hope that as time passes you will be able to think of her in her prime, doing all the things she loved to do, and then you can remember the good times you had with her. My dog was 16 when we had to let him go. I held him and talked to him right up until the end. It was heartbreaking, but it was the kindest thing I could do for him. Take care x