It will depend on what state you live in. Some states require more tests done than some others. Some states only require having a Canadian export paper that shows his federal ID tag number, and his age etc. If you take the bull yourself into the US ( as the new owner), you will not have to use a broker and thus there will be no brokerage fees. If you use someone else, who is not the owner, you will have to use a broker and there is considerably more paper work to be done. The brokerage charges are based on the value of the animal.