Keepin' it simple...
Giant sheep (40): INT animal (1); AL N; AC 7; MV 12; HD 4; THAC0 17; #AT 1; Dmg 1d6; SA charge for 2d4 hp damage; SZ L; ML 3; XP 120.
Basically, these are just really big sheep that are part of a mountain giant shepherd's flock.
Originally appeared in Dungeon #69 (1998).