“…This has been demonstrated experimentally for lasalocid and monensin, although the results are not always consistent (Mitrovic et al, 1979;Potter et al, 1986;Czarnecki, 1990). No significant reductions in weight gain were found in young poults given twice the approved use level of amprolium, diclazuril, maduramicin, robenidine or sulfadimethoxine (Mitrovic, 1968;Joyner & Norton, 1972;Vanparijs et al, 1989a;McDougald et al, 1990;Mathis, 1993). A slight weight gain depression was found, however, with 6 parts/10 6 halofuginone (McDougald, 1986).…”