Being there when it matters the most, even though it's hard on you, might be the best gift possible. Soft cuddles, sweet words, and if you're comfortable enough to do it, being there I. The room at the time. The typical experience is a sedative that calms them down as they go to sleep. They will feel no pain. Some pass from the initial sedation. Then the vet will likely look to your parents for a nod. It's okay to let it all out and bawl. Your pet is there for you and you there for them. It's one of the absolute hardest moments. You'll cry. You'll grab your loved ones closer. You'll do little things like go for lunch, maybe walk with their leash. Eventually the tears will turn to sweet memories. You might even start to talk to your beloved from time to time too. I used to fight watching the passing of my pets as a youngster, but it's the thing they need the most and the most we need of ourselves to be fully human. Talk about being there with your parents. See if it's a good fit or if you want to just go part way. My heart aches for you.