Anne Miller wrote:To me, they are pigs doing what pigs do.
Agreed! After several decades of witnessing pig behavior, I've given up trying to figure out why the do what they do. Sometimes I think they are just "messing with my head"....and doing something just because it's wacky behavior and is sure to make me confused!

Why might it be that at some point during the summer, one of them collects all of the garden hoses and stuffs them in their bedding??? It can't be for the comfort!
There are occasions when we can solidly point to the fact that they were rooting up burdock root or one was creating a nest or depression in which to nap, but other than that, what they may be obtaining from....say....your clover roots remains a mystery. On our 'stead this year....plenty of clover, no rooting there. So maybe some grub or worm..... or fountain of youth under that clover in your situation. LOL..... it's just how they are.