What tasks do you think were assigned to the dog and ox?

Please provide me with more context! I need to know what story or situation you're referring to in order to understand what tasks might have been assigned to the dog and ox.

For example:

* Are you thinking of a specific fable or myth? If so, tell me the name.

* Are you imagining a farm setting? If so, tell me what kind of farm it is.

* Are you thinking of a particular culture or historical period? This can help me understand what kind of work might be expected of these animals.

Once I have more information, I can give you a more specific and relevant answer.