Teagasc head of beef advisory, Pierce Kelly, has called for an increase in the age at which Irish beef bulls are being traded. He said that young bulls pushed with strong feeding and sold at 12-14 months are not ready to run with large cow herds.“ICBF figures show a huge fall out in Irish beef bulls by three and four years of age and I believe that our system of rearing and trading bulls is a factor in this attrition,” he added.