In the phytogenic groups, the basal diets were supplemented with the commercial feed additives Fresta F Plus and
Aromex ME Plus (Delacon Biotechnik GmbH, Steyregg, Austria), respectively. Fresta F Plus consisted of a blend of essential
oils (≥1.5% of the pure product), with caraway and lemon oil as the main components, dried herbs and spices and quillaja
saponins. Aromex ME Plus contained essential oils of rosemary, thyme (≥12.8% of pure product) and quillaja saponins. The