here we see the natural marvin sneaking up to catch his prey. he is a very rare creature. one of a kind.
This is a tricky question to word, pardon me if it still sounds weird. I can guess that if they eat only one kind of prey, then they may think anything else is weird. But why can't ThunderClan and WindClan like the taste of fish (most cats do)? Why can't RiverClan enjoy the taste of a hare or rabbit? It seems weird that the Clans express love for some kinds of food, but express obvious distaste for other kinds.