But these are all quite separate issues: animal welfare, health, moral/social objections.
If dogs were being farmed for meat, would we feel differently about it?
If we do, it is because they culturally and socially are parts of our families and we luffs them, not because their meat is intrinsically different.
And for the record, had I been on that crashed plane in the Andes, I'd've partaken in a bit of mild cannibalism. I think it's all about context.
For the record, most antibiotics don't kill bacteria, they stop them from multiplying and the immune system mops up the rest.