I personally use pruning shears. Its a lil messy (bout a tbl spoon of blood) but quick and done! One snip and the head is off! I place the baby over an open wally world sack laying on the table/counter. Snip, close the bag and toss out in the burn pile. I hate to cull babies!!! Every one has their opinion on why their way is better. You just have to find what is best for you. If you don't use enough either you can slowly suffocate. I agree if done correctly it is painless and they just go to sleep and don't wake up. It really depends on the body size. I am not putting any one down for their way! Like I said we all have our own opinions and must do what we each feel is correct for our situation. I am so sorry for the sick fuzzy butt!
I really hope he gets well with the vitamins!!! That is what it sounds like to me aswell!
Good Luck and God Bless!

Good Luck and God Bless!