I do the water trick when I have them in a live trap. I gently put a sheet over them and gently sit in the water and don’t get in a hurry. When I have then in a dog proof or other trap I plunk them in the guts with a cb long and walk away and come back later. Might seem cruel to some but I’ve tried the lungs with a 22 and it’s not 100%. I read an old fox trapping book and the guy said he shot all of his mid body with a 12 guage. I tried that and it didn’t work for me.