Pillow Sheep are a type of sheep that are made out of pillows. The first Pillow Sheep we sss is in the episode, "Puhoy," whom accidentally had a pillow tree dropped in it by Finn. After that, he was kicked out of the area.
The Pillow Sheep appears to have the body of a mattress and the head of a couch pillow. It has buttons for eyes.
- It was unbothered and unaffected after having a tree dropped on it's back. It must have some kind of low vulnerability because Finn was happy to kick it away.