A loud male voice yelling "yeeehaw!" A dry mono recording made with a KEL HM-2D condenser mic in a home ...
A flock of sheep. Like more? Go here: http://www.sheep.com/sounds/. I'm not affiliated but it seems a good resource.
a horse neighs /un caballo relincha
A stereo field recording of a cow lowing. Close miked with a Zoom H2 on-board front mics.
These are pigs eating and grunting recorded with Fostex FR2-LE MBHO MBC603 + KA100