I got these black cattle calved,the ones south I like to calve in the winter months,IVE seen spring down there nonexistent that heat can really stress cows,IM mostly down there in the fall winter and here in the spring summer,so it works good...............PS I have heard bulls called a lot of things ,but I dont believe I ever heard one called "greasy"....you boys better quit teasin faster horses,that lil mama can get mean when she needs to.LOL