"Mmm well we have regular frogs. But they're so much trouble to catch and eat it's not really something we'd normally really do? Why would you when you can have a good toadsteak?" He sighs wistfully. Ignis made the best toadsteaks.

Gigantoads are just an animal so it's not surprising that Ichigo doesn't question it. If he brought up daemons the redhead might be inclined to question him... which is, of course, precisely where that question leads.

"Most animals, where I'm from... they... they're extinct." A soft sigh, hazel eyes downcast and somber. "Without the sun and overrun with daemons most things have died out."