My concern with eating dogs and cats (which I have) is how they were fed. There isn't a lot of health safety concern with those kinds of underground meat sources can sometimes feed dead livestock back to the populace and that can cause all numbers of prion and parasitic concerns.

TBH, I'd expect them to be a bit gamey, especially cats.

Actually a lot of organic farms rely on blood and bone meal, manure and fish emulsion fertilizers. They're inexpensive as they're byproducts of other industries and are very good for plants.
When I worked in an organic greenhouse I often wondered about how vegans would feel about farmers using animal based fertilizers. We definitely told people what we used, as we sold those products, but no one ever said anything about it. I guess vegans can't control that so maybe it's a nonissue unless they grow their own food and use seaweed based fertilizer(more expensive) instead?

You can try some in Switzerland. While you can't sell the meat, slaughtering and eating it is legal. There is farms where you can "make a donation" and they'll invite you to dinner.