Well I have heard this before
Same as a cow will lay down when a storm is coming
I say, if you want to believe you will find ways to see it works, but to me
I seen cows in one field laying down and a mile down the road all standing, so, I don't buy into it much
Also, many many deer eat at night, so the theory of them chewing the cud at same times, thus laying down
Well they eat at different times, so that wouldn't make me follow that for that reason
So again, if you want to believe, you will see ways to, and I guess if like me you don't, will find ways to poke holes in the theory!
Sorry, just my 2 cents