Shares in Australian dairy group National Foods took a tumble today [Friday] following disappointing first half profits leading to a dilution in full-year profit forecasts. Net profits in the first half to December climbed 12.5% to A$25.08m (US$12.97m), but this failed to match market expectations of A$27m. Managing director Max Ould said the group expects a marginally stronger second half, but analysts commented that initial market estimates could have been too high.