"Jon, or Jonny, is a sulcata tortoise, hence the name. In keeping with Cesar’s celebrity punning tradition in naming Lorenzo [ the Llama], the tortoise’s name is a play on Jon Secada — or Jon Sulcata."
From the article, it looks like Jon lives in the same area as his horse and llama.. and has his own house/area only he can get it because the horse kept eating its hay bedding.