[jacamat]

I think it is unethical to breed brachycephalic dogs. It's merely inconvenient to own them. I don't blame dog owners for not knowing better.

I blame dog breeders for knowing better and breeding the dogs anyway.

Never say "ethically obligated" and "euthanasia" in the same sentence. That is asking the wrong question - but for the record the answer is no. Obviously. In addition to such a thing being impossible, there are easier ways forward. :-)

On suffering, the fact of the matter is that the dogs really have no idea that they're suffering. They just exist. They know nothing more than what they are exposed to, and what they perceive.

I feel that if we are obligated to do anything, it is simply to change how and for what purpose we breed animals. Deciding that the pug can still exist - with a longer nose - or that the Dalmatian can exist after they breed out their uric acid problem is attainable. It just takes work. And support, from pet owners and breed lovers, to guide people and to vote with their money.