One thousand one-day-old broiler chicks were divided into 5 experimental groups: the control groups received an antibiotic in their feed, the remaining groups -3% dried milfoil (Achillea millefolium L.) and St. Johnswort (Hypericum perforatum L.) herbage and lovage roots (Levisticum officinale Koch) mixed in various proportions. Body weight gain and feed utilization over a 9-week period of the experiment were similar in the experimental and control groups. A beneficial effect of milfoil on body weight gain of chicks was found. Milfoil in combination with St. Johnswort affected positively the sensory characteristics of meat.
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Fritz et al. (1993) studied this question.
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