[Cha Cha]

I am sorry. Are any of your neighbors children? And could they be passing your dogs table scraps? I think the bone looks like a ham bone or ham hock. I don't know if another animal would have brought that stuff into your yard not knowing your neighborhood and the kinds of animals there, but it does sound like something the neighborhood kids would do in my area. What ever it is.......scary.......knowing how sick it can make your dogs.