Why don't Westerners eat river fish?

If by "Westerners", you mean people in the Western United States, river fish are relatively rare because the area is generally quite dry. There simply aren't very many big rivers in the western US, especially in comparison with East and South Asia. Oceanic fishes are far more common and generally cheaper. read more

As for other parts of "the Western world", areas with lots of rivers tend to have more river fish, while areas without tend to have less. That said, much of the West is near oceans and many areas have long seafaring traditions, which is why most fishing is done in the ocean and most fish-eating traditions to be focused on ocean fishes. read more

Dogs do eat fish, maybe yours does not like it. I have two dogs and both of them do not like fish but my friend’s dog eats fish 3 times a week. read more