I wonder if there's any correlation between sheep grazing locations and actual desirable features for building? My intuition says sheep would graze where the g

I wonder if there's any correlation between sheep grazing locations and actual desirable features for building? My intuition says sheep would graze where the grass is greenest, which if it's like my property would be where the soil keeps water for longer after a rain, which would decidedly be a bad spot to try to set my foundation. But I don't necessarily live in the climate or a similar geological area where this folk belief originated, so now I'm curious.