The conservation status of lion is threatened. I feel the same way about eating lion that I do about southern bluefin tuna; it's not sustainable, don't do it.

I'd eat mountain lion or dog, but not lion or grey wolf.

nb: wild carnivores are almost always infected with parasites like trichinosis. If you do eat them, cook it well done.

Not the OP, but I'm in the US and.. it's complicated. I would say, in general, meats like lamb and, especially, veal have fallen out of favor due to the perceived poor conditions and youth of the animals. Rabbit isn't common in the US (it's not generally available in stores) but the "cuteness" factor plays a role here as well. This has changed since the 80's when lamb and veal were more popularly consumed. I'm guessing PETA's work has moved the needle in this area.

Living in Minnesota, however, wild game is more widely consumed so things like duck, geese, pheasant, etc. aren't seen as odd or offensive.

Horse is considered taboo for consumption in the US.

I would say, in general, Americans can be turned off a meat source if it is perceived to have produced from poor conditions or is "cute". This, however, does not apply to beef, chicken, or pork. (Though you can squeeze a few more bucks out of people by calling something "free range").

My experience with squeamishness around meats varies depending on the crowd. People I know who I would consider to be a sample of the Canadian general population tend to stick to the meat trinity.

Folks who are from multicultural groups are definitely more experimental with other kinds of meats.

Rabbit isn’t common in US grocery stores but Duck and Lamb are, especially around winter holidays.

Rabbit, Duck, and Lamb are all pretty common meats to eat in the US. Usually in finer dining, but I've never seen anyone raise an eyebrow at these. Horse, on the other hand...

Rabbit is readily available in the rural US if you hunt and skin it yourself. I could eat forever just on the population in my yard. But alas...tularemia is a thing.