Norn Iron is not necessarily Ulster (either the 'Six Counties' or the 9 depending on whether you are speaking politically or historically) Mayo is Nornish as compared with say Cork
Granted it's "a good couple o' hours" from Cork, but then everywhere in Ireland is either "a couple o' hours away" or "a good couple o' hours away" - common sense tells me that Mayo is in the mid-West though.
Anyway your man at the shop was as understated as ever Mayo men are wont to be.... in the Cork Examiner he was quoted as saying the bull had impeccable taste, having run past Tescos to get to SuperValu.
Provost Mehaffy of TCD being asked to define an 'Irish Bull' (eg Better to be a coward now than a dead man all your life)d said that 'An Irish Bull is always pregnant' In this case the Mayo 'Wild West rather than Mid West surely-common sense hardly applies) Bull was no Bull-much too small. This was a Bullock and the first vowel may have been misplaced!!
Indeed one of the staff had identified it as being a bullock. If it happened in Berwick they'd be hard pressed to tell the difference between a bovine and an ovine.