− | Primary bloat can occur in feedlot cattle but is generally associated with pastures rich in leguminous plants or alfalfa. | + | Primary bloat can occur in feedlot cattle but is generally associated with pastures rich in leguminous plants. There is a particularly high prevelence in New Zealand due to the high level of clover. In the UK occurance of the disease coincides with turnout to lush pasture, especially in spring and autumn. |