Can I cook couscous for a chicken dish in my crock pot at the same time as the chicken?
I think this is going to be a bad idea; you'll go from ideal couscous texture (fluffy and light) to mush. I have an article (on my blog) about how to make fluffy couscous. The crux is simply to put it, with the appropriate amount boiling water, in a wide, shallow vessel and cover it for 5 minutes. You can even set that up ahead of time, and when you are ready to serve the food from your crockpot, just add the boiling water from a teakettle and you'll be good to go.