Have you ever had a dog euthanized?

Yes, I have and it was the hardest thing I ever had to do. My dog was really sick and his condition was untreatable. I could have kept him with me but I was relocating and my new apartment didn't accept animals. Therefore, I didn't have a choice but to put him to sleep. It really affected me because that was my first dog as an adult and I had him for years-it was as if I lost a child. I would never want to experience anything like that again.