Chicken

From LSWiki

Chickens are small, oviparous (usually) flightless birds who are a common domesticated animal.

In Lost Souls, perhaps because of the influence of Hakkax, chickens are often spotted in their giant variety. At their enhanced size, their squawks can create damaging sonic frequencies, and their large beaks and claws can cause adequate combat damage. Additionally, their enhanced size seems to enable them to fly, and they can actually be mounted...

..by those who are willing to be seen riding a flying chicken.