poweryoga said: it might just look good and not taste good.
On that note, it'd be nice to see a one-off where yukkuri tastes were judged off their perception of appearance rather than the actual content of the food.
And they still try to get my attention by messing around with my food, confound this hiduki yu's and their adorable misshaps!
Trololo
I think, to some degree, that already happens, like if you give them something that looks "delicious" they won't mind what is made off, as long as it isn't anything that kills or damage them, so you could give them dirt shaped like a delicious chocolate and they wouldn't mind much.
But I think that depends of the author some have yukkuris giving a lot of importance to taste, to the point of the famous "taste getting ruined" if they spoil themselves with better stuff.
Ohai said: Pretty sure that's how Yukkuris do tasting.
There are trick candies for yukkuri in many strips and such where even if they eat something they think will be appetizing, the inherent heat/sourness/bitterness still is tasted and effects them.