Done it twice. To all who have the question, should I be with my pet when the end comes, the answer is yes. It was one of the hardest things I’ve ever done but the pet needs somebody who loves them there at the end. They won’t be so scared and you’ll both feel better to know that they weren’t.
I wasn't when I had to euthanize my last cat and I've regretted it every day since....
I'll be with my current friend when the day eventually comes.