In Logan v. Chatham County, 113 Ga. App. 491 (148 SE2d 471) (1966) the Court held that " all questions relating to the expert's employment by the condemnor would be irrelevant and inadmissible . . . because testimony as to the original employment was not pertinent to the issues in the case and if admitted over objection would have . . . constituted grounds requiring a reversal." Id. at 493 (2). This is because a party is not bound by the rejected opinions of its expert witnesses. See id. The holding in Logan "is a correct general statement regarding the use at trial of expert witnesses originally employed by the opposing party," and also applies in other types of cases