Sub animations

Is it possible to have one animation that is part of another larger animation w$$anonymous$$ch will then be controlled through an animation controller? The reason that I ask t$$anonymous$$s is that I am making a walking animation and would like a seperate animation from the feet, than that of the rest of the body. T$$anonymous$$s would allow me to more easily modify the animation of the feet and would also allow me to repeat the animation used for one foot on the second, just with a delay. How may i go about doing t$$anonymous$$s?

Yes I know i can have an animated foot sub object, but how would I then control both the feet and the rest of the body in the animation controller? Is there a better way to accomplish what I want?