On a fine sunny morning when the nagging wind that has blighted so much of this spring was absent, a group of Forum walkers met up in Feniton voillage.   The walk was a mix of country lanes field paths and tracks, and offered some long views over rolling countryside towards Exeter and Dartmoor.   The most noteworthy feature was the group's fearless traversing of three fields containing cattle, the first with a herd of Longhorns, amongst which was a bull.   It was just as well we did not realise there was a bull among them until we passed through the far gate and found a notice warning of its presence!