My sis in law has about 10 horses that live together in a field, some mini's and some qh, and a big draft x. They all come running to the fence and she makes sure she pours it onto grass, not mud, but pours the scoops into piles and makes sure everyone gets some. They usually do pretty good. The ones who might need medicine get theirs seperately. I think the buckets sound like a good idea!