how do birds compare to lizards for spreading cow patties?

Does anyone have experience comparing birds  (i.e. chickens)to lizards for spreading manure left on a field to decompose? Lets discuss.

I do understand that lizards can dig if they're motivated to do so.

I've never heard of or seen lizards doing anything with cow patties, but I definitely have observed turkeys doing it.  Years ago we were raising some turkeys, and had nowhere fenced well enough to let them free range except a pasture already hosting a dairy cow and calf.  So we fenced off their feeder so the cows couldn't steal their food and put them out there with them.  The turkeys, still pretty small, like small chicken size, immediately set to work on the cow patties, going after any maggots and insects and undigested corn, and scratching the patties down into the sod.  Then after a while we saw them following the cow around and picking off the big horseflies that would land on her to bite, if they could reach them.  Eventually the cow understood what was going on and would lie down and let the birds walk all over her to get at the flies!  It was a beautiful demonstration of how combining elements in the system benefitted all concerned....cow gets flies picked, turkeys get extra munchies, and pasture gets manure spread....