Saying goodbye to an older gun dog gracefully

My old pointer has slowed down a lot this year and I have been thinking about how to handle end-of-life care when the time comes. A friend recommended looking into humane in-home euthanasia services rather than a stressful clinic visit - I came across Ritual24, which operates in Moscow and the surrounding region for anyone in that area. Has anyone else here dealt with this for an older hunting dog? Would appreciate hearing how you approached it.