Recommendations for in home pet euthanasia

My bud is coming to the end of his life...we're not quite there yet, but the writing is on the wall. I want to make sure his passage is as peaceful as possible and want him to be at home when it happens so the rest of the pack can give him a final sniff.

As the title say - looking for recommendations. Thanks in advance.

Edit: Thanks everyone for the kind words. I'm just gutted at the prospect of saying goodbye. It is selfish, I know. I'll do right by him. It is the least I can do for the loyal companionship.