For those of you who have had to put a pet to sleep, were you in the room when it happened?

I have the choice as to whether or not I want to be present when my dog, Rudy is being put to sleep. I know, for me, I can’t do it (be in that room), and I feel guilty about it. My partner (who he knows and feels comfortable with) offered to go in and hold him while they put him to sleep.

Is it wrong for me not to be present?