I would like to suggest that you do not even try this. It sounds as if you have had this animal friend for a long time and I believe that you owe this dog a humane ending to it's life. If this was me, I would find a vet that will come to your home to euthanize your animal companion. Yes, it will cost some money and your dog is worth it. You may have to make payments to the vet to have this done. Please give this last gift to your faithful, loving animal. It is the least you can do.

Blueduck

Whe the intervention? Why can't he just die peacefully in his sleep? I'm not being judgemental, but I put my cat to sleep at the vet's recommendation and I will always regret it. Not that I think he would have lived, but that he could have just gone to sleep when he was ready. Animals in the wild die all the time without a vet, I'm sure they are fine.

I don't know what the answer is but I fully agree with you about wanting to do it at home. They have Hospice for people, I don't see why an animal member of the family should be treated any worse. The only thing I could think of is to ask your vet for something that you could administer at home. You can't be the first person to want to do this at home. If the vet refuses you might ask a pharmacist just "hypothetically speaking" for some information. Or the Humane Society? Or even someone at Hospice?

I don't know but I wish you well with it and I'm sorry.