When I sell a flush, I will get the cow to the flush center & then the buyer is responsible for the rest of the costs associated with the flush. I guarantee 6 freezable embryo's & they get any that's over that. If they get less than 6 then they can flush the cow again & after the guarantee is fulfilled then we split the embryo's & the cost . Or I will prorate the cost of the flush. I don't have a problem at all on splitting 2 flushes with the buyer if we agree on the sires to be used.