What is the world rank for cattle?

It's not possible to give a world rank for cattle in a simple way. You need to specify what kind of ranking you are looking for. For example:

* Population: Cattle are the most populous livestock globally, with billions of individuals.

* Economic importance: Cattle are a major source of meat, dairy products, and hides, making them extremely important in the global economy.

* Environmental impact: Cattle contribute to greenhouse gas emissions and deforestation, making them a subject of environmental concern.

Please clarify what kind of ranking you are interested in, and I can provide more specific information.