Complex sentence: Animals raised with the plant learn to avoid it because of the foul taste of the green and flowering plants, but naive cattle, goats or sheep placed on pastures containing dried plants in late fall and winter are frequently poisoned.
Split into simpler sentences: Animals raised with the plant learn to avoid it because of the foul taste of the green and flowering plants. However, naive cattle, goats or sheep placed on pastures containing dried plants in late fall and winter are frequently poisoned.