Such creatures in your settlement are called hounds. They come in different sizes and types and mostly lead a single or paired lifestyle.
Fearos is two meters tall at the withers and reaches almost fifteen meters in length. He has a massive tail, twice the height of his body.
He has two pairs of main paws, resembling cheetah paws in structure, they allow him to overcome huge distances. He is hardy and agile due to his graceful and flexible body. Predator. 

Your fluffy friend in Middle Ages

He didn't have a name until he met you. You still don't know how this creature settled in your house. One night you noticed how the creature was staring at you with hungry eyes from your big wooden closet.