One's an inanamite object that clutters up the lawn, the other is a piece of wood.

    

     What's ugly, drooly and goes 200 mph?

     A chihuahua in a blender.

 

     What's ugly, drooly and has an IQ of 150?

     150 chihuahuas.

 

     What's ugly, drooly and goes yip, yip, yip?

     A Chihuahua on a frying pan.

 

     Chihuahuas should ideally not wear clothes, except for a paper bag.