We had to put our family dog of 15 years down a few years ago, he was a Pembroke welsh corgi cutest dog ever. I grew up with it. He ended up contracting a few diseases and his body slowly but surely started shutting down. It was really hard to watch, it felt almost as if a family member was passing away right in front of my eyes.
I bought a AKC Black Lab right before my other dog passed away to try and help I guess? And I'll tell you what, watching them put him to sleep was one of the hardest things I've ever done.
But I was glad that it was painless and it felt nice to know that he's in a better play now. I was shocked at how quickly he went down though, it literally was a matter of seconds. It really felt like a family member was gone, so many memories and good times.