Depending on age/type of cattle you're probably looking at least two 747F loads. See Page 195 of the IATA Live Animals Regs for stocking density. Full grown cattle (700 KG ea) can only be packed 4 to a pallet; while smalleer cattle (300kg ea) can go 8 to a pallet. In any event, once you add in the weight of the pens, you'll weight out before you bulk out. All that being said - don't forget to call Evergreen for a competitive quote.