Goat

The goat is a hollow-horned, bearded mammal, originally indigenous to mountainous areas. Although it hasn't been seen in many episodes thus far, it played a major role in Walk Like An Egyptian - Part 2's challenge, along with the camel.

Hook, Line, and Screamer
After Owen falls off the edge of the cliff, he proceeds to land on a variety of objects, the goat being one of them.

Riot On Set
Gwen mentions that she had a petting job at the zoo and she had to clean up after the goats. In the same episode, Duncan, while acting, mentions a goat that his character had in their youth.

The Aftermath: III
The goat appears very briefly in Owen's animation form during The Aftermath: III, when Owen is mentioning all the bad things he's done, he mentions stealing his Uncle Max's toupee and gluing it to a goat's backside at the petting zoo. It only appears in cartoon form.

Walk Like An Egyptian - Part 1
The goat was a prize that was rewarded to Team Chris Is Really Really Really Really Hot for coming in second place in the pyramid challenge. The goat appears to be quite aggressive, because as soon as Chris introduced it, it charged towards Tyler and headbutted him.

Walk Like An Egyptian - Part 2
Team Chris Is Really Really Really Really Hot is able to perfectly balance their team on the goat despite its small size compared to the team. The goat is able to move the group across the desert and they are the first ones to make it to the Nile River. The goat seems to have a very good relationship with Alejandro, as it jumps into his arms while they paddle across the Nile. Since the team was able to keep the goat with them during the entire challenge, the team is safe from elimination.

Slap Slap Revolution
Chris orders a vicious, rabid goat to attack the contestants, but before it can attack them, it encounters one of the local goats, which is much bigger and seemingly more ferocious than it. In an instant, the small one eats the larger one, then turns to attack the contestants. During the challenge, it attacks Team Victory and Team Chris Is Really Really Really Really Hot. Leshawna helps Lindsay to avoid its attack, while DJ catches him. He holds him in the air and the goat hits a tree branch that they pass under, and gets left behind.

Aftermath: Revenge of the Telethon
The goat was seen in a segment called "DJ's World Of Animals." DJ tries to pet the goat, but it ends up hurting itself from trying to break free of the cage. Once Blaineley, in an attempt to raise money for the show through ratings, sets them out of their cages, all of the animals attack everyone in the studio, with the goat ultimately attacking the camera after attacking Geoff.