We are pretty sure one of our hens has a crop issue. We are planning on separating her this afternoon when we get home, but I don't want to wait until then to try to help her. I was thinking of mixing some olive oil in with yogurt and taking it out to them in their coop this morning before leaving. Will olive oil hurt the chickens that are healthy? Yogurt is one way I know I can get oil into her because they are all yogurt fiends!